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A295439
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a(n) = (9*n)!*(4*n)!/((8*n)!*(3*n)!*(2*n)!).
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1
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1, 18, 714, 32175, 1531530, 75167268, 3762157035, 190878381495, 9781950631050, 505159120481400, 26246321470970964, 1370400311694822954, 71844872838316074315, 3779480916094795749180, 199405648908172208299875, 10547211550872819183622800, 559103542410000371874708618
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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..16.
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FORMULA
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G.f.: hypergeom([1/9, 2/9, 4/9, 5/9, 7/9, 8/9], [1/8, 3/8, 1/2, 5/8, 7/8], 14348907/262144*x).
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MATHEMATICA
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f[n_] := (9 n)! (4 n)!/((8 n)!*(3 n)! (2 n)!); Array[f, 17, 0] (* or *)CoefficientList[ Series[ HypergeometricPFQ[{1/9, 2/9, 4/9, 5/9, 7/9, 8/9}, {1/8, 3/8, 1/2, 5/8, 7/8}, 14348907/262144 x], {x, 0, 16}], x] (* Robert G. Wilson v, Nov 23 2017 *)
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CROSSREFS
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Cf. A295431.
Sequence in context: A046674 A073421 A346216 * A159873 A259458 A180781
Adjacent sequences: A295436 A295437 A295438 * A295440 A295441 A295442
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KEYWORD
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nonn
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AUTHOR
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Gheorghe Coserea, Nov 23 2017
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STATUS
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approved
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