A155752 Where 2's occur in the prime differences A001223.

1, 2, 4, 6, 9, 12, 16, 19, 25, 27, 32, 34, 40, 42, 44, 48, 51, 56, 59, 63, 68, 80, 82, 88, 97, 103, 108, 112, 115, 119, 139, 141, 143, 147, 151, 170, 172, 175, 177, 181, 189, 200, 205, 208, 211, 214, 224, 229, 233, 235, 252, 255, 261, 264, 267, 276, 285, 287, 293, 295, 301

Offset

1,2

Comments

Starts with the same numbers as A053096.

Links

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

Formula

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

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

Mathematica

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

Crossrefs

Sequence in context: A257637 A258027 A053096 * A145801 A033291 A105434

Adjacent sequences: A155749 A155750 A155751 * A155753 A155754 A155755

Keyword

nonn

Author

Paul Curtz, Jan 26 2009

Extensions

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

Status

approved