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%I #2 Mar 30 2012 18:37:04
%S 1,1,3,8,26,79,274,964,3496,12664,46157,168240,615173,2256669,8321911,
%T 30871862,115280183,433247309,1638036186,6225871432,23769249188,
%U 91077899373,350002189936,1348065993111,5201249282212,20094668668700
%N Central terms of triangle A131909.
%F a(n) = A131909(2n,n) for n>=0.
%o (PARI)
%Y Cf. A131909.
%K nonn
%O 0,3
%A _Paul D. Hanna_, Jul 26 2007
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