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a(n) = (24*n)!*(9*n)!*(6*n)!*(4*n)!/((18*n)!*(12*n)!*(8*n)!*(3*n)!*(2*n)!).
1

%I #4 Nov 28 2017 22:02:39

%S 1,2622,18395142,146893400940,1239644505129030,10788772828908810372,

%T 95762108788362083967900,861689801350732909790930328,

%U 7831988825786019814338666836550,71735998233558658268051328890615700,661068900973188409771193653810093715892

%N a(n) = (24*n)!*(9*n)!*(6*n)!*(4*n)!/((18*n)!*(12*n)!*(8*n)!*(3*n)!*(2*n)!).

%F G.f.: hypergeom([1/24, 5/24, 7/24, 11/24, 13/24, 17/24, 19/24, 23/24], [1/18, 5/18, 7/18, 1/2, 11/18, 13/18, 17/18], 262144/27*x).

%Y Cf. A295431.

%K nonn

%O 0,2

%A _Gheorghe Coserea_, Nov 28 2017