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A295476 a(n) = (20*n)!*(9*n)!*(6*n)!/((18*n)!*(10*n)!*(4*n)!*(3*n)!). 1

%I #7 May 12 2018 10:01:14

%S 1,190,95238,54503020,32989143110,20598742103940,13119794010495900,

%T 8472058672655664024,5526367916474032140870,3632882290435237504630420,

%U 2402807931482709593805719988,1597125851104281978332538662760,1065954690102347966626416591930140

%N a(n) = (20*n)!*(9*n)!*(6*n)!/((18*n)!*(10*n)!*(4*n)!*(3*n)!).

%F G.f.: hypergeom([1/20, 3/20, 7/20, 9/20, 11/20, 13/20, 17/20, 19/20], [1/18, 5/18, 7/18, 1/2, 11/18, 13/18, 17/18], 10000000000/14348907*x).

%t Table[Times@@(#!&/@(n{20,9,6}))/Times@@(#!&/@(n{18,10,4,3})),{n,0,20}] (* _Harvey P. Dale_, May 12 2018 *)

%Y Cf. A295431.

%K nonn

%O 0,2

%A _Gheorghe Coserea_, Nov 28 2017

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Last modified April 25 08:27 EDT 2024. Contains 371964 sequences. (Running on oeis4.)