A022759 n-th 6k+1 prime plus n-th 6k+5 prime.

12, 24, 36, 54, 66, 84, 108, 120, 132, 150, 180, 192, 210, 234, 252, 282, 294, 312, 348, 366, 378, 402, 420, 456, 474, 510, 528, 540, 570, 582, 612, 630, 660, 684, 720, 732, 756, 792, 810, 834, 858, 888, 906, 936, 960, 990, 1020, 1038, 1074

Offset

1,1

Links

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

Formula

a(n) = A002476(n) + A007528(n). - Sean A. Irvine, May 20 2019

Mathematica

Module[{nn=60, pr1, pr5, len}, pr1=Select[Prime[Range[2nn]], Mod[#, 6]==1&]; pr5= Select[ Prime[Range[2nn]], Mod[#, 6]==5&]; len=Min[Length[pr1], Length[ pr5]]; Total/@Thread[{Take[pr1, len], Take[pr5, len]}]] (* Harvey P. Dale, Aug 11 2017 *)

Crossrefs

Cf. A002476, A007528.

Sequence in context: A371413 A019550 A117304 * A335540 A091193 A335541

Adjacent sequences: A022756 A022757 A022758 * A022760 A022761 A022762

Keyword

nonn

Author

Clark Kimberling

Status

approved