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A155750 First differences of A031215. 2
4, 6, 6, 10, 8, 6, 10, 8, 10, 8, 10, 12, 6, 6, 18, 8, 12, 12, 10, 8, 12, 6, 24, 6, 10, 12, 12, 8, 10, 12, 18, 6, 20, 12, 10, 14, 10, 14, 12, 12, 12, 10, 14, 6, 16, 12, 12, 18, 20, 16, 12, 8, 16, 8, 12, 6, 22, 6, 12, 14, 10, 18, 18, 14, 10, 14, 12, 18, 22, 12, 6, 12, 18, 6, 18, 6, 24 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

All terms are even. Do all even numbers (A005843) appear at least once?

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..5000

FORMULA

a(n) = A001223(2n) + A001223(2n+1). - R. J. Mathar, Feb 27 2009

a(n) = A031131(2n). - R. J. Mathar, Feb 27 2009

MATHEMATICA

Table[Prime[2*n+2] - Prime[2 n], {n, 80}] (* G. C. Greubel, Jun 05 2021 *)

PROG

(Sage) [nth_prime(2*n+2) - nth_prime(2*n) for n in (1..80)] # G. C. Greubel, Jun 05 2021

CROSSREFS

Cf. A005843, A031215.

Cf. A001223, A031131, A110854, A155067.

Sequence in context: A183986 A160995 A215454 * A159475 A098350 A276269

Adjacent sequences:  A155747 A155748 A155749 * A155751 A155752 A155753

KEYWORD

nonn,easy

AUTHOR

Paul Curtz, Jan 26 2009

EXTENSIONS

Edited and extended by R. J. Mathar, Feb 27 2009

STATUS

approved

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Last modified August 10 00:21 EDT 2022. Contains 356026 sequences. (Running on oeis4.)