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Search: id:A029177
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| A029177 |
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Expansion of 1/((1-x^2)(1-x^4)(1-x^5)(1-x^12)). |
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+0
2
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| 1, 0, 1, 0, 2, 1, 2, 1, 3, 2, 4, 2, 6, 3, 7, 4, 9, 6, 10, 7, 13, 9, 15, 10, 19, 13, 21, 15, 25, 19, 28, 21, 33, 25, 37, 28, 43, 33, 47, 37, 54, 43, 59, 47, 67, 54, 73, 59, 82, 67, 89, 73, 99, 82, 107, 89, 118, 99, 127, 107, 140, 118, 150, 127, 164, 140, 175, 150, 190, 164, 203
(list; graph; listen)
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OFFSET
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0,5
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LINKS
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Index entries for two-way infinite sequences
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FORMULA
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G.f.: 1/((1-x^2)(1-x^4)(1-x^5)(1-x^12)). a(n)=-a(-23-n).
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MAPLE
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M := Matrix(23, (i, j)-> if (i=j-1) or (j=1 and member(i, [2, 4, 5, 11, 12, 18, 19, 21])) then 1 elif j=1 and member(i, [6, 7, 9, 14, 16, 17, 23]) then -1 else 0 fi); a := n -> (M^(n))[1, 1]; seq (a(n), n=0..70); - Alois P. Heinz (heinz(AT)hs-heilbronn.de), Jul 25 2008
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PROGRAM
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(PARI) a(n)=if(n<-22, -a(-23-n), polcoeff(1/((1-x^2)*(1-x^4)*(1-x^5)*(1-x^12))+x*O(x^n), n))
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CROSSREFS
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Cf. A029011(n)=a(2n)=a(2n+5). a(n)=A029011(A084964(n)-2).
Sequence in context: A025802 A139631 A145706 this_sequence A161229 A029176 A161053
Adjacent sequences: A029174 A029175 A029176 this_sequence A029178 A029179 A029180
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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