A172016 Numbers of the form 6*k-+1 such that 6*k-1=nonprime and 6*k+1=prime.

35, 37, 65, 67, 77, 79, 95, 97, 125, 127, 155, 157, 161, 163, 209, 211, 221, 223, 275, 277, 305, 307, 329, 331, 335, 337, 365, 367, 371, 373, 377, 379, 395, 397, 407, 409, 437, 439, 455, 457, 485, 487, 497, 499, 539, 541, 545, 547, 575, 577, 605, 607, 611

Offset

1,1

Links

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

Mathematica

Select[#+{-1, 1}&/@(6Range[200]), CompositeQ[#[[1]]]&&PrimeQ[#[[2]]]&]// Flatten (* Harvey P. Dale, Nov 19 2019 *)

Crossrefs

A171688 U A171697 U A172015 U A172016 = A007310.

Sequence in context: A041611 A160775 A160021 * A064610 A030589 A114965

Adjacent sequences: A172013 A172014 A172015 * A172017 A172018 A172019

Keyword

nonn

Author

Juri-Stepan Gerasimov, Jan 22 2010

Extensions

Entries checked by R. J. Mathar, Apr 14 2010

Status

approved