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A059280 Expansion of e.g.f. exp(x*(1-x)/(1-2*x)). 1
1, 1, 3, 19, 169, 1881, 25051, 388123, 6854289, 135847729, 2984843251, 71990208291, 1890448291513, 53681369925769, 1638782161569099, 53515590723668011, 1861256728947455521, 68680836821259109473, 2679760172141508857059 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
FORMULA
E.g.f.: exp(x*(1-x)/(1-2*x)).
a(n) ~ 2^(n-1)*exp(1/8+sqrt(n)-n)*n^(n-1/4). - Vaclav Kotesovec, Jun 27 2013
MATHEMATICA
With[{nn=20}, CoefficientList[Series[Exp[x (1-x)/(1-2x)], {x, 0, nn}], x ]Range[0, nn]!] (* Harvey P. Dale, Mar 31 2013 *)
CROSSREFS
Sequence in context: A349253 A080835 A080836 * A085295 A094956 A080894
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jan 24 2001
STATUS
approved

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Last modified March 19 01:34 EDT 2024. Contains 370952 sequences. (Running on oeis4.)