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A259213 Column 2 of triangle A258829. 2
1, 2, 11, 38, 263, 1260, 10871, 66576, 694599, 5182960, 63738259, 561098224, 7969169739, 80865956192, 1304923903919, 14998292190464, 271341955926479, 3484403002454016, 69899466563099435, 991886288235459072, 21861082423955691795, 339715268249655012352 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Vaclav Kotesovec, Table of n, a(n) for n = 0..460

FORMULA

a(n) ~ n! * (d*(1-(-1)^n) + 1+(-1)^n)*c/2 * d^n * n^2, where d = 0.8218983778054251105765881248..., c = 0.986093542875063325007949... . - Vaclav Kotesovec, Jun 21 2015

CROSSREFS

Cf. A258829, A258830.

Sequence in context: A203534 A166989 A143550 * A259658 A000175 A276659

Adjacent sequences:  A259210 A259211 A259212 * A259214 A259215 A259216

KEYWORD

nonn

AUTHOR

Vaclav Kotesovec, Jun 21 2015

STATUS

approved

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Last modified June 17 13:12 EDT 2021. Contains 345080 sequences. (Running on oeis4.)