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%I #5 Sep 08 2013 13:31:00
%S 1,5,55,1415,69025,5403005,616437655,96365988815,19756766836225,
%T 5140259013390005,1654190282113104055,645005323804145184215,
%U 299613583126435893179425,163464903833408195554809005
%N Main diagonal and central terms of symmetric triangle A126155.
%F a(n)=Sum_{k, 0<=k<=n}A130847(n,k)*4^k. - _Philippe Deléham_, Jul 22 2007
%Y Cf. A126155; A126156 (column 0), A126158 (diagonal).
%K nonn
%O 0,2
%A _Paul D. Hanna_, Dec 20 2006
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