OFFSET
1,3
REFERENCES
K. Knopp, Theory and application of infinite series, Dover, p. 547.
O. Perron, Über das infinitäre Verhalten der Koeffizienten einer gewissen Potenzreihe, Archiv d. Math. u. Phys. (3), Vol. 22, pp. 329-340, 1914.
FORMULA
a(n) is the denominator in Sum_{i=1..n} binomial(n-1, i-1)*2^i/i!.
CROSSREFS
KEYWORD
nonn,frac
AUTHOR
Benoit Cloitre, Feb 03 2002
STATUS
approved