1,2

Starts with the same numbers as A053096.

Table of n, a(n) for n=1..61.

A001223(1+a(n)) = 2.

a(n) = A029707(n)-1. - R. J. Mathar, Feb 23 2009

Flatten[Position[Differences[Prime[Range[400]]], 2]]-1 (* Harvey P. Dale, Jun 21 2017 *)

Sequence in context: A257637 A258027 A053096 * A145801 A033291 A105434

Adjacent sequences: A155749 A155750 A155751 * A155753 A155754 A155755

nonn

Paul Curtz, Jan 26 2009

Edited and extended by R. J. Mathar, Feb 23 2009

approved