A049180 Revert transform of 2*x*(1 - x - x^3 + x^4 - x^5)-x/(1+x).

1, 1, 3, 11, 43, 183, 815, 3749, 17693, 85161, 416451, 2063255, 10334187, 52241811, 266203487, 1365869249, 7050739841, 36591914977, 190811893315, 999264296139, 5253232501219, 27713207861343, 146664411527631, 778434156770069

Offset

1,3

Comments

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

Links

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

Index entries for reversions of series

Maple

Order := 80:
g := 2*x*(1-x-x^3+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: A151103 A049189 A049163 * A049152 A151104 A138787

Adjacent sequences: A049177 A049178 A049179 * A049181 A049182 A049183

Keyword

nonn

Author

Olivier Gérard

Extensions

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

Status

approved