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Search: id:A144897
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| A144897 |
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Expansion of x/((1-x-x^3)*(1-x)^3). |
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+0
2
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| 0, 1, 4, 10, 21, 40, 71, 121, 204, 348, 609, 1097, 2021, 3767, 7035, 13082, 24160, 44318, 80883, 147201, 267702, 487225, 888115, 1621465, 2964090, 5422351, 9921404, 18150445, 33193146, 60679800, 110893986, 202625306, 370215059
(list; graph; listen)
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OFFSET
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0,3
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FORMULA
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G.f.: x/((1-x-x^3)*(1-x)^3).
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MAPLE
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a := n-> (Matrix(5, (i, j)-> if i=j-1 then 1 elif j=1 then [4, -6, 5, -4, 3, -1][i] else 0 fi)^n)[1, 2]: seq (a(n), n=0..40);
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CROSSREFS
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4th column of A144903.
Sequence in context: A023538 A085360 A024988 this_sequence A001891 A121497 A132925
Adjacent sequences: A144894 A144895 A144896 this_sequence A144898 A144899 A144900
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KEYWORD
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nonn
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AUTHOR
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Alois P. Heinz (heinz(AT)hs-heilbronn.de), Sep 24 2008
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