A049181 Revert transform of 2*x*(1 - x + x^2 - x^3 + x^4 - x^5)-x/(1+x).

1, 1, 1, 1, 1, 1, 3, 17, 73, 241, 661, 1585, 3461, 7285, 16231, 41921, 124577, 389233, 1186617, 3423201, 9327801, 24355849, 62489483, 162336209, 437155705, 1226390417, 3534342301, 10244919841, 29383388701, 82792942045

Offset

1,7

Comments

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

Links

Table of n, a(n) for n=1..30.

Index entries for reversions of series

Maple

Order := 80:
g := 2*x*(1-x+x^2-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: A317452 A128948 A342364 * A248917 A282400 A342365

Adjacent sequences: A049178 A049179 A049180 * A049182 A049183 A049184

Keyword

nonn

Author

Olivier Gérard

Extensions

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

Status

approved