A049188 Revert transform of 2*x*(1 - x + x^4 - x^5 + x^6)-x/(1+x).

1, 1, 3, 9, 31, 113, 429, 1679, 6719, 27367, 113053, 472471, 1993785, 8483023, 36348595, 156705421, 679218965, 2957961685, 12936141935, 56787742645, 250137441355, 1105189823717, 4896749876081, 21751355833739

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^4-x^5+x^6)-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: A063032 A056335 A276549 * A049165 A052709 A049179

Adjacent sequences: A049185 A049186 A049187 * A049189 A049190 A049191

Keyword

nonn

Author

Olivier Gérard

Extensions

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

Status

approved