OFFSET
0,4
FORMULA
E.g.f.:
MAPLE
egf := (tanh(x) + x*(2*x*tanh(x) - 1)*sech(x)^2)/8; ser := series(egf, x, 30):
seq(n!*coeff(ser, x, n), n=0..29);
CROSSREFS
KEYWORD
sign
AUTHOR
Peter Luschny, Aug 09 2019
STATUS
approved