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%I #14 Sep 30 2023 16:38:15
%S 1,2,18,320,8750,326592,15529668,899678208,61556811030,4862000000000,
%T 435644983598396,43678490079264768,4846281282497517772,
%U 589650705050503577600,78074729079345703125000,11177395284330167371038720,1720546364146510165684599270
%N a(n) = A000272(n+1) * A000984(n).
%H Reinhard Zumkeller, <a href="/A227325/b227325.txt">Table of n, a(n) for n = 0..250</a>
%F a(n) = A088956(2*n, n) = (n+1)^(n-1) * C(2*n, n).
%o (Haskell)
%o a227325 n = a000272 (n + 1) * a000984 n
%Y Cf. A000272, A000984.
%Y Central terms of triangle A088956.
%K nonn
%O 0,2
%A _Reinhard Zumkeller_, Jul 07 2013
%E Typo in formula fixed by _Zak Seidov_, Jul 08 2013
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