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A108412 Expansion of (1+x+x^2)/(1-4x^2+x^4). +0
1
1, 1, 5, 4, 19, 15, 71, 56, 265, 209, 989, 780, 3691, 2911, 13775, 10864, 51409, 40545, 191861, 151316, 716035, 564719, 2672279, 2107560, 9973081, 7865521, 37220045, 29354524, 138907099, 109552575, 518408351, 408855776, 1934726305 (list; graph; listen)
OFFSET

0,3

FORMULA

a(0)=a(1)=1, a(2)=5, a(n)a(n+3) - a(n+1)a(n+2) = -1.

CROSSREFS

Bisections are A001833 and A001834.

Adjacent sequences: A108409 A108410 A108411 this_sequence A108413 A108414 A108415

Sequence in context: A100791 A056883 A006747 this_sequence A133167 A133173 A070374

KEYWORD

nonn

AUTHOR

Ralf Stephan, Jun 05 2005

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.


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