A140379 Nonprimes of the form 14k+1.

1, 15, 57, 85, 99, 141, 155, 169, 183, 225, 253, 267, 295, 309, 323, 351, 365, 393, 407, 435, 477, 505, 519, 533, 561, 575, 589, 603, 645, 687, 715, 729, 771, 785, 799, 813, 841, 855, 869, 897, 925, 939, 981, 995, 1023, 1037, 1065, 1079, 1107, 1121, 1135

Offset: 1

Author

Juri-Stepan Gerasimov, Jun 13 2008

Keywords

• nonn
• less

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A136062.

Programs

Magma

[a: n in [0..90] | not IsPrime(a) where a is 14*n+1]; // Vincenzo Librandi, Mar 22 2014

Mathematica

Select[14 Range[0, 100] + 1, ! PrimeQ@# &] (* Vincenzo Librandi, Mar 22 2014 *)

Extensions

Edited by R. J. Mathar, Jun 16 2008