E.g.f. (1+x+x^2)^(x+x^2).

A191351

E.g.f. (1+x+x^2)^(x+x^2).

Terms

    a(0) =1a(1) =0a(2) =2a(3) =9a(4) =8a(5) =130a(6) =1134a(7) =-252a(8) =29504a(9) =447480a(10) =-1837800a(11) =14172840a(12) =471846792a(13) =-4864408848a(14) =14099478288

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