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A352906 Expansion of e.g.f. sinh(x) / (1 - sin(x)). 0

%I #6 Apr 08 2022 09:49:04

%S 0,1,2,7,24,101,472,2507,14784,96361,687392,5332207,44694144,

%T 402663821,3880880512,39848805107,434306095104,5007757446481,

%U 60907946680832,779345606053207,10465549612529664,147168296199468341,2162785172079204352,33155700678534788507,529311396083558989824

%N Expansion of e.g.f. sinh(x) / (1 - sin(x)).

%F a(n) = Sum_{k=0..floor((n-1)/2)} binomial(n,2*k+1) * A000111(n-2*k).

%F a(n) ~ sinh(Pi/2) * 2^(n + 7/2) * n^(n + 3/2) / (exp(n) * Pi^(n + 3/2)). - _Vaclav Kotesovec_, Apr 07 2022

%t nmax = 24; CoefficientList[Series[Sinh[x]/(1 - Sin[x]), {x, 0, nmax}], x] Range[0, nmax]!

%Y Cf. A000111, A000667, A000795, A001250, A002084, A062161, A062272, A322623, A348580.

%K nonn

%O 0,3

%A _Ilya Gutkovskiy_, Apr 07 2022

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Last modified August 30 04:38 EDT 2024. Contains 375526 sequences. (Running on oeis4.)