View Single Post
Old 2017-08-11, 14:47   #11
ericw
 
ericw's Avatar
 
Oct 2015

19 Posts
Default

https://oeis.org/A100289
Numbers n such that (1!)^2 + (2!)^2 + (3!)^2 +...+ (n!)^2 is prime.
a(19) = 32841 from Serge Batalov, Jul 29 2017
ericw is offline   Reply With Quote