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A001780
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Expansion of 1/((1+x)(1-x)^9).
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4
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1, 8, 37, 128, 367, 920, 2083, 4352, 8518, 15792, 27966, 47616, 78354, 125136, 194634, 295680, 439791, 641784, 920491, 1299584, 1808521, 2483624, 3369301, 4519424, 5998876, 7885280, 10270924, 13264896
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OFFSET
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0,2
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 0..2000
Index to sequences with linear recurrences with constant coefficients, signature (8,-27,48,-42,0,42,-48,27,-8,1)
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FORMULA
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a(n) = 431*n/168 +(-1)^n/512 +391*n^3/288+ 26011*n^2/10080 +797*n^4/1920 +11*n^5/144 +n^6/120 +n^7/2016 +n^8/80640 +511/512. - R. J. Mathar, Mar 15 2011
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PROG
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(PARI) Vec(1/(1+x)/(1-x)^9+O(x^99)) \\ Charles R Greathouse IV, Apr 18 2012
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CROSSREFS
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Sequence in context: A050536 A110215 A052387 * A053296 A055799 A035038
Adjacent sequences: A001777 A001778 A001779 * A001781 A001782 A001783
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KEYWORD
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nonn,easy
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AUTHOR
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N. J. A. Sloane.
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STATUS
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approved
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