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A192249
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1-sequence of reduction of binomial coefficient sequence B(n,4)=A000332 by x^2 -> x+1.
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2
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0, 5, 20, 90, 300, 930, 2610, 6900, 17295, 41605, 96660, 218145, 480225, 1034765, 2188385, 4552745, 9334760, 18892805, 37794765, 74817520, 146702410, 285169310, 549948760, 1052879110, 2002263910, 3784182685, 7110957850, 13291250220
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OFFSET
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1,2
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COMMENTS
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See A192232 for definition of "k-sequence of reduction of [sequence] by [substitution]".
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LINKS
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FORMULA
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Conjecture: G.f.: 5*x^2*(1-2*x+4*x^2-3*x^3+x^4) / ( (x-1)*(x^2+x-1)^5 ). - R. J. Mathar, May 04 2014
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MATHEMATICA
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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