0,3

L. Comtet, Analyse Combinatoire, P. U. F., 1970, tome second, p. 140, #12.

L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 293, Problem 11.

S. R. Finch, Mathematical Constants, Cambridge, 2003, Section 1 . 3 . 1.

Sum_{n>=0} a(n)/(2n)!*x^n = (1 - x)^(-1/x) / e.

a(n) = A055505(n)*(2n)! / A055535(n).

1 + 1/2!*x + 11/4!*x^2 + 315/6!*x^3 + 17129/8!*x^4 + 503475/10!*x^5 + ...

Cf. A055505, A055535.

Sequence in context: A070278 A090272 A090271 this_sequence A108274 A115609 A166053

Adjacent sequences: A106824 A106825 A106826 this_sequence A106828 A106829 A106830

nonn,frac

DELEHAM Philippe (kolotoko(AT)wanadoo.fr), May 21 2005