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A155752 Where 2's occur in the prime differences A001223. 2
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified October 21 08:47 EDT 2019. Contains 328292 sequences. (Running on oeis4.)