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a(n) = (30*n)!*(5*n)!*(3*n)!*(2*n)!/((15*n)!*(10*n)!*(8*n)!*(6*n)!*n!).
1

%I #5 Nov 28 2017 14:09:21

%S 1,2772725670,40337629723514950470,671214073076279711920414071900,

%T 11815915461993730897935386470911734090310,

%U 214599520915474479942307452790907076147031402434420,3975780607168011583140781349809187812166883920578195778723100

%N a(n) = (30*n)!*(5*n)!*(3*n)!*(2*n)!/((15*n)!*(10*n)!*(8*n)!*(6*n)!*n!).

%F G.f.: hypergeom([1/30, 7/30, 11/30, 13/30, 17/30, 19/30, 23/30, 29/30], [1/8, 1/4, 3/8, 1/2, 5/8, 3/4, 7/8], 5189853515625/256*x).

%Y Cf. A295431.

%K nonn

%O 0,2

%A _Gheorghe Coserea_, Nov 28 2017