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A171734
First differences of A171733.
0
2, 0, 6, 24, 10, 96, 14, 240, 18, 480, 22, 840, 26, 1344, 30, 2016, 34, 2880, 38, 3960, 42, 5280, 46, 6864, 50, 8736, 54, 10920, 58, 13440, 62, 16320, 66, 19584, 70, 23256, 74, 27360, 78, 31920, 82, 36960, 86, 42504, 90, 48576, 94, 55200, 98, 62400, 102
OFFSET
0,1
FORMULA
a(2n) = A016825(n). a(2n+1) = 24*A000292(n).
G.f.: 2*( 1-x^2+12*x^3-x^4+x^6 ) / ( (x-1)^4*(1+x)^4 ). - R. J. Mathar, Jul 02 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Paul Curtz, Dec 17 2009
STATUS
approved