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A155067 First differences of A031368. 2
3, 6, 6, 6, 8, 10, 6, 12, 8, 6, 10, 14, 6, 6, 18, 10, 12, 8, 10, 12, 12, 6, 14, 16, 6, 8, 16, 12, 8, 6, 24, 6, 18, 16, 6, 14, 12, 10, 12, 18, 12, 8, 10, 12, 6, 20, 12, 10, 14, 24, 16, 8, 16, 12, 8, 10, 14, 12, 10, 8, 16, 14, 18, 18, 12, 12, 10, 12, 24, 14, 12, 6, 24, 6, 18, 6, 24, 12, 18, 10 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

All but the first term are even.

LINKS

Table of n, a(n) for n=1..80.

FORMULA

a(n)= A031368(n+1)-A031368(n).

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

a(n)= A031131(2n-1). - R. J. Mathar, Feb 27 2009

CROSSREFS

Cf. A110854.

Sequence in context: A113737 A292165 A040006 * A094011 A295558 A295559

Adjacent sequences:  A155064 A155065 A155066 * A155068 A155069 A155070

KEYWORD

nonn,easy

AUTHOR

Paul Curtz, Jan 19 2009

EXTENSIONS

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

STATUS

approved

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Last modified August 20 01:14 EDT 2019. Contains 326136 sequences. (Running on oeis4.)