Numbers n such that Sum_{k=1..n} k! - 2 is prime.
3, 4, 5, 12, 13, 19, 65, 90, 123, 211, 281, 45
2 seqfan posts
Mon Feb 9 09:36:07 CET 2009 [seqfan] Re: is A055493 finite?
Mon Feb 9 09:14:54 CET 2009 [seqfan] is A055493 finite?
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
Links to OEIS content are included according to
The OEIS End-User License Agreement
.