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A155067
First differences of A031368.
4
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
OFFSET
1,1
COMMENTS
All but the first term are even.
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
KEYWORD
nonn,easy
AUTHOR
Paul Curtz, Jan 19 2009
EXTENSIONS
Edited and extended by R. J. Mathar, Feb 27 2009
STATUS
approved