A049185 Revert transform of 2*x*(1 - x - x^5 + x^6)-x/(1+x).

1, 1, 3, 9, 33, 127, 517, 2171, 9359, 41139, 183749, 831479, 3803859, 17563853, 81747331, 383116181, 1806427061, 8563227837, 40787427055, 195106310221, 936890791253, 4514624943827, 21823938003449, 105804610564879

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^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: A063027 A364211 A148998 * A049162 A049176 A049151

Adjacent sequences: A049182 A049183 A049184 * A049186 A049187 A049188

Keyword

nonn

Author

Olivier Gérard

Extensions

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

Status

approved