View Single Post
Old 2018-04-30, 06:43   #2
JeppeSN
 
JeppeSN's Avatar
 
"Jeppe"
Jan 2016
Denmark

2·34 Posts
Thumbs up

You are absolutely right. This is about primes 10*b^t + 1 for fixed b when t runs from 1 through infinity. You call it reversed Sierpiński?

I am extending A088783 as you suggested (see "History" of the entry until edits are approved).

/JeppeSN
JeppeSN is offline   Reply With Quote