A158910 First Differences of A061240.

18, 18, 18, 54, 18, 18, 18, 72, 18, 36, 18, 36, 36, 18, 18, 72, 18, 54, 36, 18, 36, 90, 18, 36, 90, 54, 36, 36, 18, 18, 54, 90, 36, 54, 18, 18, 54, 36, 18, 54, 18, 54, 18, 36, 90, 36, 54, 36, 54, 36, 18, 18, 54, 36, 72, 18, 108, 36, 36, 72, 18, 18, 126, 36, 54, 54, 54, 36, 126

Offset

1,1

Comments

Since A061240 contains prime numbers of the form 9k+5, k even, all numbers here are multiples of 18.

Links

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

Mathematica

Differences[Select[Prime[Range[500]], Mod[#, 9]==5&]] (* Harvey P. Dale, May 19 2018 *)

Crossrefs

Cf. A008600.

Sequence in context: A282814 A010857 A369860 * A243097 A040307 A022352

Adjacent sequences: A158907 A158908 A158909 * A158911 A158912 A158913

Keyword

nonn,less

Author

Paul Curtz, Mar 30 2009

Extensions

Edited and extended by R. J. Mathar, Apr 03 2009

Status

approved