Voozh

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

(list; graph; refs; listen; history; text; internal format)

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