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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
OFFSET
1,1
COMMENTS
All terms are even. Do all even numbers (A005843) appear at least once?
LINKS
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
KEYWORD
nonn,easy
AUTHOR
Paul Curtz, Jan 26 2009
EXTENSIONS
Edited and extended by R. J. Mathar, Feb 27 2009
STATUS
approved