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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..50.

Index entries for linear recurrences with constant coefficients, signature (0,4,0,-6,0,4,0,-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

Sequence in context: A307581 A261566 A247443 * A278746 A280217 A079203

Adjacent sequences:  A171731 A171732 A171733 * A171735 A171736 A171737

KEYWORD

nonn,easy

AUTHOR

Paul Curtz, Dec 17 2009

STATUS

approved

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Last modified November 12 13:43 EST 2019. Contains 329058 sequences. (Running on oeis4.)