A349204 - OEIS

A349204

a(n) = A065176(n + 2) * n! * [x^n](exp(x) / (1 + cos(x))).

1, 1, 3, 5, 5, 11, 111, 305, 235, 781, 5733, 22475, 48065, 217751, 8527167, 43899265, 30286495, 174772921, 2148821763, 13744073645, 46580213525, 327156548291, 9697877988981, 74211034240235, 149247386387155, 1236079055785861, 21456247956983193, 191231275195061015

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OFFSET

0,3

LINKS

Table of n, a(n) for n=0..27.

FORMULA

a(n) = 2^A007814(A052928(n+2))*n!*[x^n](exp(x) / (1 + cos(x))).

MAPLE

# Using function A065176(n).

egf := exp(x) / (1 + cos(x)): ser := series(egf, x, 30):

seq(A065176(n+2)*n!*coeff(ser, x, n), n = 0..27);

CROSSREFS