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%I #4 Mar 30 2012 18:36:39
%S 1,1,1,2,6,30,221,2201,27769,424757,7639190,157969167,3692733181,
%T 96293669499,2771232779481,87247362424120,2982901522141490,
%U 110057420712635526,4358745145279372293,184433423940319376323
%N Shifts 2 places left under the hyperbinomial transform.
%F a(n+2) = sum(k=0, n, (n-k+1)^(n-k-1)*binomial(n, k)*a(k)), for n>=0, with a(0)=1, a(1)=1.
%Y Cf. A088956, A001858.
%K nonn
%O 0,4
%A _Paul D. Hanna_, Nov 04 2003
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