20150804, 04:08  #1 
"Matthew Anderson"
Dec 2010
Oregon, USA
495_{16} Posts 
Matt A and the Online Encyclopedia of Integer Sequences
Hi Math People,
The Online Encyclopedia of Integer Sequences is a good reference for integer information. Using a program written by Henry, I lengthened A257138, a list of 13 tuples. I found that the existing 18th entry had one digit too many. I informed the referees and am now waiting for a response. I have contributed to OEIS many times. http://oeis.org/A257138 Regards, Matt Last fiddled with by Uncwilly on 20220614 at 15:58 
20150804, 06:55  #2  
∂^{2}ω=0
Sep 2002
República de California
11,743 Posts 
Quote:


20150810, 01:01  #3 
"Matthew Anderson"
Dec 2010
Oregon, USA
3×17×23 Posts 
The referees are working on this entry

20150813, 20:24  #4 
"Matthew Anderson"
Dec 2010
Oregon, USA
495_{16} Posts 
Hi Math People,
You may see the draft entry for the OEIS entry I am working on now. https://oeis.org/draft/A257138 I am still waiting on the referees. Regards, Matt 
20150817, 15:14  #5 
"Matthew Anderson"
Dec 2010
Oregon, USA
3×17×23 Posts 
Hi Math People,
A257138 has been corrected. Regards, Matt 
20160910, 05:47  #6 
"Matthew Anderson"
Dec 2010
Oregon, USA
3·17·23 Posts 
A034856/
Hi Math People,
I was exploring oeis.org. This is the Online Encyclopedia of integer sequences. oeis.org/A034856/ Many people have double checked this encyclopedia. I read that for A034856, a(n) reduces to n*(n+3)/2  1. When I work it through, I reach the expression n*(n1)/2 1. Probably I am wrong and the encyclopedia is right. I assume that binomial(n,k) = n!/(k!(nk)!). Can someone else check this expression? Regards, Matt 
20160910, 07:25  #7  
Sep 2003
13·199 Posts 
Quote:
Code:
binomial(n+1, 2) + (n − 1) n*(n+1) 2*(n−1) =  +  2 2 n*n + 1*n + 2*n − 2 =  2 n*(n+3) − 2 =  2 n*(n+3) =  − 1 2 some of us know that 1+2+3+...=n*(n+1)/2. Last fiddled with by MattcAnderson on 20220710 at 03:06 

20160910, 14:20  #8 
"Matthew Anderson"
Dec 2010
Oregon, USA
3·17·23 Posts 
Thank you GP2. You are correct.
Regards, Matt 
20210824, 23:28  #9 
"Matthew Anderson"
Dec 2010
Oregon, USA
10010010101_{2} Posts 
My contributions to OEIS
My best OEIS contribution is A201998. It was part of my "prime producing polynomial" project in 2006.
oeis.org/A201998 and http://oeis.org/A235381 is some of my best work (from over 5 years ago) Matt Last fiddled with by MattcAnderson on 20220715 at 07:51 Reason: added second .pdf file added oeis links 
20211115, 11:52  #10 
"Matthew Anderson"
Dec 2010
Oregon, USA
3×17×23 Posts 
oeis.org slash A010882
Hi again all,
I thought that it would be fun to share about a OEIS (Online Encyclopedia of Integer Sequences) entry. This one is a finite and repeating pattern. Specifically, it starts with one and goes like one, two, three and again one, two, three. look  A010882 another simple look  https://oeis.org/A000081 another simple look  oeis.org/A12 This is the simplest of all possible positive sequences. It is the all ones sequence. oeis.org/a10 I found the phi(n) function on my own in my explorations of the trinomial n^2+n+41. Regards, Matt Last fiddled with by MattcAnderson on 20220715 at 08:44 
20211116, 14:52  #11 
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
3×3,581 Posts 
My suggestion is, instead of making a new thread for each OEIS sequence that you find interesting, just have a single thread for all of them. I think it would be more interesting.
