A138687 - OEIS

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A138687

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

1

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

(list; graph; refs; listen; history; text; internal format)

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