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%I
%S 0,16,416,34096,5794624,1680121936,82501802464,2065646660464,
%T 1739147340740224,210617970218777104,288533264855755545376,
%U 485294472126860897387056,485518650207447822251456
%N a(n) = numerator of 8 Catalan + Pi^2 - Zeta[2, (4 n + 1)/4]
%C All numbers in this sequence are divisable by 16.
%C A173947/16 see A173949.
%t Table[Numerator[RootApproximant[N[8 Catalan + \[Pi]^2 - Zeta[2, (4 n + 1)/4], 100], 1]], {n, 0, 20}]
%Y Cf. A120268, A173945, A173948
%K frac,nonn
%O 1,2
%A _Artur Jasinski_, Mar 03 2010
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