A110115 Numerators in expansion of 1/((1-4x^2)^(1/4)*sqrt(1+x)).

1, -1, 11, -13, 403, -463, 9151, -10213, 927107, -1018523, 24904453, -27146443, 1385487191, -1503960923, 39429635239, -42696346517, 9123713130467, -9863649273491, 267124391149801, -288455062092079, 15791128647774109, -17037222513016049, 470331436870352329

Offset

0,3

Comments

Numerators in expansion of inverse binomial transform of 1/sqrt(1-2x-3x^2)^(1/4) Denominators are A046161.

Links

Table of n, a(n) for n=0..22.

Mathematica

Numerator[CoefficientList[Series[1/((1-4x^2)^(1/4) Sqrt[1+x]), {x, 0, 25}], x]] (* Harvey P. Dale, Oct 03 2011 *)

Crossrefs

Cf. A110114.

Sequence in context: A288304 A155967 A111070 * A073765 A360277 A174831

Adjacent sequences: A110112 A110113 A110114 * A110116 A110117 A110118

Keyword

easy,sign,frac

Author

Paul Barry, Jul 12 2005

Status

approved