A120228 Numbers n such that a+n and a*n+1 are prime, case a=8.

5, 9, 11, 29, 35, 39, 51, 65, 71, 75, 95, 101, 119, 129, 131, 141, 149, 165, 185, 215, 219, 225, 249, 261, 269, 285, 299, 305, 309, 329, 339, 341, 371, 375, 381, 401, 431, 441, 449, 459, 471, 479, 491, 555, 591, 599, 611, 635, 639, 651, 711, 725, 731, 735, 761

Offset

1,1

Comments

Cases a=4 A120226, a=5 A120227, a=6 A120222. Prime numbers p such that a+p and a*p+1 are prime A106057-A106066.

Links

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

Mathematica

Select[Range[800], AllTrue[{8+#, 8#+1}, PrimeQ]&] (* The program uses the AllTrue function from Mathematica version 10 *) (* Harvey P. Dale, May 28 2016 *)

Crossrefs

Cf. A106057-A106066, A120222, A120226, A120227.

Sequence in context: A190894 A214262 A288143 * A053749 A099082 A062217

Adjacent sequences: A120225 A120226 A120227 * A120229 A120230 A120231

Keyword

nonn

Author

Zak Seidov, Jun 10 2006

Status

approved