A024329 Expansion of log(1+log(1+x)^2)/2.

0, 0, 1, -3, 5, 10, -116, 126, 6054, -68760, 255336, 3099360, -53045136, 55156608, 10024873104, -175247246160, 693221858736, 29064929199744, -605379922107648, -445102785680256, 264990555297131904, -5736069117714297600

Offset

0,4

Links

Robert Israel, Table of n, a(n) for n = 0..447

Formula

E.g.f. log(1+log(1+x)^2)/2. - Robert Israel, Dec 26 2018

Maple

S:= series(log(1+log(1+x)^2)/2, x, 31):
seq(coeff(S, x, n)*n!, n=0..30); # Robert Israel, Dec 26 2018

Mathematica

Log[ 1+Log[ 1+x ]^2 ]/2

Crossrefs

Cf. A009325.

Sequence in context: A358899 A317338 A305510 * A354517 A354389 A297422

Adjacent sequences: A024326 A024327 A024328 * A024330 A024331 A024332

Keyword

sign

Author

R. H. Hardin

Extensions

Extended with signs, Mar 1997

Status

approved