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A115851 G.f. x^2*(-1+x+x^2)/((1-x)*(2*x-1)*(x+1)*(x^2+1)). +0
1
0, 0, 1, 1, 1, 2, 5, 9, 17, 34, 69, 137, 273, 546, 1093, 2185, 4369, 8738, 17477, 34953, 69905, 139810, 279621, 559241, 1118481, 2236962, 4473925, 8947849, 17895697, 35791394, 71582789, 143165577, 286331153, 572662306, 1145324613 (list; graph; listen)
OFFSET

0,6

LINKS

Index entries for sequences related to linear recurrences with constant coefficients

FORMULA

a(n) + a(n+2) = A005578(n)

CROSSREFS

Cf. A005578, A001045.

Sequence in context: A129696 A082281 A000569 this_sequence A163734 A019135 A069957

Adjacent sequences: A115848 A115849 A115850 this_sequence A115852 A115853 A115854

KEYWORD

nonn

AUTHOR

Creighton Dement (creighton.k.dement(AT)uni-oldenburg.de), Mar 29 2006

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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