E.g.f. A(x) satisfies: A( x - Sum_{n>=2} x^n/(n*(n-1)/2) ) = x.

A209937

E.g.f. A(x) satisfies: A( x - Sum_{n>=2} x^n/(n*(n-1)/2) ) = x.

Terms

    a(0) =1a(1) =2a(2) =14a(3) =164a(4) =2692a(5) =56832a(6) =1466656a(7) =44735392a(8) =1574507104a(9) =62807331520

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