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A280758
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Expansion of (1 + x + x^2)/(1 - x - 3*x^2 - x^3 + x^4).
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0
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1, 2, 6, 13, 32, 75, 178, 422, 999, 2368, 5609, 13290, 31486, 74597, 176736, 418723, 992042, 2350350, 5568463, 13192832, 31256529, 74053138, 175447094, 415670205, 984808096, 2333212667, 5527860066, 13096635958, 31028620727, 73513176000, 174167814073, 412639326842, 977627324334, 2316199942933
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OFFSET
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0,2
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LINKS
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Table of n, a(n) for n=0..33.
R. Sachdeva and A. K. Agarwal, Combinatorics of certain restricted n-color composition functions, Discrete Mathematics, 340, (2017), 361-372. See sequence C_6.
Index entries for linear recurrences with constant coefficients, signature (1, 3, 1, -1).
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CROSSREFS
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Sequence in context: A062424 A258344 A099232 * A053562 A003039 A109385
Adjacent sequences: A280755 A280756 A280757 * A280759 A280760 A280761
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KEYWORD
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nonn,easy
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AUTHOR
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N. J. A. Sloane, Jan 16 2017
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STATUS
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approved
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