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Search: id:A091005
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A091005 Expansion of x^2/((1-2x)(1+3x)). +0
5
0, 0, 1, -1, 7, -13, 55, -133, 463, -1261, 4039, -11605, 35839, -105469, 320503, -953317, 2876335, -8596237, 25854247, -77431669, 232557151, -697147165, 2092490071, -6275373061, 18830313487, -56482551853, 169464432775, -508359743893, 1525146340543 (list; graph; listen)
OFFSET

0,5

COMMENT

2^n=A091003(n)+3*A091004(n)+6*A091005(n). Inverse binomial transform of A091002.

FORMULA

a(n)=2^n/10-4(-3)^n/15+0^n/6

CROSSREFS

Cf. A015441.

Sequence in context: A018562 A112540 A015441 this_sequence A133664 A106976 A098478

Adjacent sequences: A091002 A091003 A091004 this_sequence A091006 A091007 A091008

KEYWORD

easy,sign

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Dec 13 2003

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Last modified September 5 19:27 EDT 2008. Contains 143485 sequences.


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