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%I #6 Jul 02 2023 15:21:48
%S 1,4,36,200,1720,12480,118560,1081920,11793600,131443200,1658764800,
%T 21990528000,319711795200,4922394624000,81508654080000,
%U 1428114530304000,26582538673152000,521466739605504000,10779099461222400000,233753593186713600000,5310546788872765440000
%N Second column (m=2) of triangle A144886 (S1hat(4)).
%F a(n) = A144886(n+2,2), n>=0.
%Y Cf. A144886, A001715 (first column), A144889 (third column).
%K nonn,easy
%O 0,2
%A _Wolfdieter Lang_, Oct 09 2008
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