A372521 G.f. A(x) satisfies A(A(A(A(A(x))))) = x + 5*x^2 + 25*x^3.

0, 1, 1, 1, -24, 176, -524, -5124, 87126, -506774, -1759824, 57671226, -358791624, -2206347624, 49453238976, -92944954824, -4824317301399, 31062072140001, 557647434392001, -6058153265478399, -93734220877891074, 1402372000511972226, 21436083233577492876

Offset: 0

Author

Seiichi Manyama, May 04 2024

Keywords

• sign

Crossrefs

Cf. A220110, A220288, A371841, A372537.

Formula

Define the sequence b(n,m) as follows. If n

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