A172053 n-th nonnegative number k such that neither 6*k+-1 is prime plus n-th number m such that 6*m+-1 are both twin primes.

1, 22, 27, 36, 41, 46, 53, 65, 68, 77, 82, 99, 103, 112, 124, 128, 134, 139, 149, 162, 176, 183, 193, 206, 225, 232, 237, 243, 249, 276, 282, 287, 293, 301, 330, 339, 346, 351, 358, 371, 385, 402, 405, 408, 413, 434, 443, 454, 457, 479, 482, 497, 505, 510, 522

Offset

1,2

Links

Table of n, a(n) for n=1..55.

Formula

a(n)=A171696(n)+A002822(n).

Crossrefs

Cf. A002822, A171696.

Sequence in context: A306481 A211320 A215601 * A038355 A043128 A043908

Adjacent sequences: A172050 A172051 A172052 * A172054 A172055 A172056

Keyword

nonn

Author

Juri-Stepan Gerasimov, Jan 24 2010

Extensions

Entries checked by R. J. Mathar, May 22 2010

Status

approved