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A162587 Prime numbers p = 8n + 7 for which k = (7 * (256^n - 16^n) + n^2) / (n * p) is an integer 2
23, 31, 47, 71, 79, 103, 127, 151, 167, 199, 223, 263, 367, 439, 487, 607, 631, 647, 727, 823, 887, 967, 1031, 1087, 1303, 1327, 1367, 1447, 1543, 1567, 1607, 1879, 1951, 2207, 2311, 2503, 2647, 2671, 2887, 3079, 3271, 3463, 3527, 3607, 3727, 3847, 3967 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

MATHEMATICA

Transpose[Select[Table[{n, 8n+7}, {n, 500}], PrimeQ[Last[#]]&&IntegerQ[(7*(256^First[ #]-16^First[#])+First[#]^2)/Times@@#]&]][[2]] (* Harvey P. Dale, Sep 13 2014 *)

CROSSREFS

Cf. A162586

Cf. A158034, A158035

Cf. A161896, A161897

Sequence in context: A031924 A257528 A240886 * A033216 A139837 A145375

Adjacent sequences:  A162584 A162585 A162586 * A162588 A162589 A162590

KEYWORD

easy,nonn

AUTHOR

Reikku Kulon, Jul 07 2009

STATUS

approved

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Last modified March 26 10:18 EDT 2019. Contains 321491 sequences. (Running on oeis4.)