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Search: id:A130102
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A130102 E.g.f.: (e^x-x)^2;. +0
3
1, 0, 2, 2, 8, 22, 52, 114, 240, 494, 1004, 2026, 4072, 8166, 16356, 32738, 65504, 131038, 262108, 524250, 1048536, 2097110, 4194260, 8388562, 16777168, 33554382, 67108812, 134217674, 268435400, 536870854, 1073741764, 2147483586 (list; graph; listen)
OFFSET

0,3

FORMULA

E.g.f.: e^(2x)-2xe^x+x^2; a(n)=2^n-2n+2*C(2, n)-4*C(1, n)+2*C(0, n); a(n)=sum{k=0..n, C(n,k)*A060576(k)*A060576(n-k)};

CROSSREFS

Adjacent sequences: A130099 A130100 A130101 this_sequence A130103 A130104 A130105

Sequence in context: A098277 A080040 A060823 this_sequence A113464 A054093 A098557

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), May 07 2007

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Last modified October 6 12:54 EDT 2008. Contains 144667 sequences.


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