A126108 Numbers n such that n^2-2 and (n+2)^2-2 are primes.

3, 5, 7, 13, 19, 27, 33, 35, 47, 61, 69, 75, 117, 119, 231, 237, 257, 265, 299, 301, 313, 335, 355, 357, 441, 447, 467, 489, 495, 523, 573, 607, 713, 761, 943, 993, 1021, 1069, 1071, 1141, 1147, 1175, 1231, 1239, 1251, 1265, 1287, 1357, 1363, 1365, 1391, 1461

Offset

1,1

Comments

The number of such n's <= 10^n: 3, 12, 36, 216, 1279,... Cf A126334 for prime n's.

Links

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

Mathematica

Select[Range[10^5], PrimeQ[#^2-2] && PrimeQ[(#+2)^2-2]&]

Crossrefs

Cf. A126334.

Sequence in context: A354217 A338567 A340339 * A100859 A336369 A111703

Adjacent sequences: A126105 A126106 A126107 * A126109 A126110 A126111

Keyword

nonn

Author

Zak Seidov, Mar 11 2007

Status

approved