Number of numbers <= n that are neither safe primes and nor Sophie Germain primes.
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4
1 seqfan posts
Sat May 2 16:12:32 CEST 2009 [seqfan] Re: OEIS duplicate hunt