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A294189 E.g.f.: exp(2*(1/(1-x)^2 - 1)). 2
1, 4, 28, 256, 2848, 37024, 547936, 9064192, 165339904, 3290839552, 70870959616, 1640130678784, 40555349598208, 1066271901822976, 29684252411219968, 871864036043259904, 26931181039027879936, 872418396180001718272, 29564373329109844885504 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Seiichi Manyama, Table of n, a(n) for n = 0..427

PROG

(PARI) N=66; x='x+O('x^N); Vec(serlaplace(exp(2*(1/(1-x)^2-1))))

CROSSREFS

Column k=2 of A294188.

Cf. A136658.

Sequence in context: A191801 A064340 A002895 * A141004 A217806 A152410

Adjacent sequences:  A294186 A294187 A294188 * A294190 A294191 A294192

KEYWORD

nonn

AUTHOR

Seiichi Manyama, Oct 24 2017

STATUS

approved

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Last modified February 28 13:10 EST 2021. Contains 341707 sequences. (Running on oeis4.)