A049179 Revert transform of 2*x*(1 - x + x^4 - x^5)-x/(1+x).

1, 1, 3, 9, 31, 113, 431, 1697, 6849, 28181, 117787, 498705, 2134499, 9220393, 40146495, 176011777, 776363417, 3442818809, 15340344035, 68645684937, 308365373183, 1390064360561, 6286153799119, 28510001658689

Offset

1,3

Comments

Sign diagram of generating sequence: +++--++---------...

Links

Table of n, a(n) for n=1..24.

N. J. A. Sloane, Transforms

Index entries for reversions of series

Maple

Order := 80:
g := 2*x*(1-x+x^4-x^5)-x/(1+x) ;
solve(series(g, x)=y, x) :
convert(%, polynom) :
seq(coeff(%, y, i), i=0..Order-1) ; # R. J. Mathar, Jul 24 2023

Crossrefs

Sequence in context: A049188 A049165 A052709 * A049154 A225305 A365113

Adjacent sequences: A049176 A049177 A049178 * A049180 A049181 A049182

Keyword

nonn

Author

Olivier Gérard

Extensions

NAME corrected. - R. J. Mathar, Jul 24 2023

Status

approved