Maximum k with 1 <= k <= n such that nk + 1 is prime (or 0 if no such prime exists).
1, 2, 2, 4, 2, 6, 6, 5, 8, 10, 8, 9, 12, 14, 14, 16, 14, 17, 12, 20, 20, 21, 20, 24, 24, 26
1 seqfan posts
Thu Dec 17 22:00:58 CET 2009 [seqfan] Re: Primes of the form kn+1