A292909 E.g.f.: exp(1/2! * x^2 * exp(-x)).

1, 0, 1, -3, 9, -40, 210, -1176, 7273, -49932, 372060, -2971540, 25359411, -230364498, 2215550428, -22460391240, 239236043985, -2669869110856, 31134833803728, -378485082644400, 4786085290280275, -62838103267148790, 855122923978737876

Offset: 0

Author

Seiichi Manyama, Sep 26 2017

Keywords

• sign

Links

• Seiichi Manyama, Table of n, a(n) for n = 0..530

Crossrefs

Column k=2 of A292948.

Cf. A133189, A292907.

Programs

PARI

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

Formula

a(n) = (-1)^n * A133189(n).