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A025187
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a(n) = T(2n,n-1), where T is the array defined in A025177.
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1
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1, 3, 16, 84, 459, 2552, 14378, 81783, 468622, 2700926, 15640800, 90930523, 530391615, 3102491160, 18192186330, 106901798100, 629361849402, 3711413384462, 21919199253088, 129625701167820
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OFFSET
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1,2
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LINKS
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FORMULA
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Conjecture: +12*n*(1573*n-2085)*(3*n-1)*(3*n+1)*a(n) +(259519*n^4-6550685*n^3+19840883*n^2-20466403*n+6720078)*a(n-1) -54*(2*n-3)*(63141*n^3-343882*n^2+645379*n-388606)*a(n-2) -324*(n-3)*(4693*n-5417)*(2*n-3)*(2*n-5)*a(n-3)=0. - R. J. Mathar, Feb 25 2015
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MAPLE
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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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