A372795 E.g.f. A(x) satisfies A(A(A(A(x)))) = (exp(8*x) - 1)/8.

0, 1, 2, -2, 8, 24, -2240, 59600, -640000, -35477120, 2287843200, -337824000, -8328489693696, 320219485774848, 53149588906171392, -5832590252624818176, -534898113615540043776, 142559169839206640025600, 6582786304965587026329600

Offset: 0

Author

Seiichi Manyama, May 13 2024

Keywords

• sign

Crossrefs

Cf. A184011, A209519, A372746.

Cf. A372796.

Formula

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

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