A138687 Composite n with no prime of the form 2n + p^2 for any prime p.

28, 34, 55, 58, 76, 88, 100, 106, 118, 133, 145, 148, 160, 166, 178, 184, 202, 208, 214, 232, 238, 244, 253, 259, 262, 265, 268, 286, 298, 301, 310, 328, 340, 343, 352, 358, 361, 364, 370, 385, 388, 391, 403, 412, 418, 430, 442, 445, 448, 454, 475, 478, 490

Offset

1,1

Links

Table of n, a(n) for n=1..53.

Formula

Composite members of A138685.

Crossrefs

Cf. A138479, A138685, A138686.

Sequence in context: A280649 A134657 A261106 * A330758 A214470 A055576

Adjacent sequences: A138684 A138685 A138686 * A138688 A138689 A138690

Keyword

nonn

Author

Artur Jasinski, Mar 26 2008

Extensions

Typo corrected by Michel Marcus, Nov 04 2013

Status

approved