A172052 a(n)=abs(A171696(n)-A002822(n)).

1, 18, 21, 26, 27, 26, 29, 31, 32, 31, 32, 39, 39, 46, 48, 48, 44, 45, 45, 46, 36, 39, 39, 32, 35, 32, 31, 29, 29, 6, 8, 11, 7, 7, 10, 5, 4, 3, 6, 13, 25, 24, 25, 26, 27, 42, 41, 40, 39, 57, 58, 59, 61, 64, 74, 87, 87, 91, 93, 99, 102, 103, 102, 101, 102, 101, 108, 106, 111, 115

Offset: 1

Author

Juri-Stepan Gerasimov, Jan 24 2010

Keywords

• nonn

Comments

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).

Crossrefs

Cf. A002808, A171696.

Extensions

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