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%I #5 Nov 28 2017 14:09:35
%S 1,83980,29966636700,12398706131799988,5447952226877283703580,
%T 2473617870747229982625186480,1146602219745194113307246953503300,
%U 539110100779634346434520330628287843000,256130864665265316470308479790547084791062300,122657586881362583078239819278500645564891283341200
%N a(n) = (20*n)!*(6*n)!*n!/((12*n)!*(10*n)!*(3*n)!*(2*n)!).
%F G.f.: hypergeom([1/20, 3/20, 7/20, 9/20, 11/20, 13/20, 17/20, 19/20], [1/12, 1/3, 5/12, 1/2, 7/12, 2/3, 11/12], 10000000000/19683*x).
%Y Cf. A295431.
%K nonn
%O 0,2
%A _Gheorghe Coserea_, Nov 28 2017