A049187 Revert transform of 2*x*(1-x)*(1+x^2-x^5) -x/(1+x).

1, 1, 1, 1, 3, 15, 57, 167, 423, 1099, 3391, 11855, 41149, 134185, 418859, 1313861, 4285349, 14456605, 49097477, 164889821, 548126215, 1824046555, 6131204373, 20817947419, 70988707243, 241907381783, 823235370195, 2804366824235

Offset

1,5

Comments

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

Links

Table of n, a(n) for n=1..28.

Index entries for reversions of series

Maple

Order := 80:
g := 2*x*(1-x)*(1+x^2-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: A346542 A033853 A284014 * A049161 A358685 A118048

Adjacent sequences: A049184 A049185 A049186 * A049188 A049189 A049190

Keyword

nonn

Author

Olivier Gérard

Extensions

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

Status

approved