1,2

Abs(n-th nonnegative number such that neither 6*k+-1 is prime minus n-th number such that 6*m+-1 are both twin primes).

Table of n, a(n) for n=1..70.

Cf. A002808, A171696.

Sequence in context: A185099 A216295 A217058 * A001101 A088341 A105145

Adjacent sequences: A172049 A172050 A172051 * A172053 A172054 A172055

nonn

Juri-Stepan Gerasimov, Jan 24 2010

a(65) and terms from a(67) on corrected by R. J. Mathar, May 22 2010

approved