A049172 Revert transform of 2*x*(1 - x - x^3)-x/(1+x).

1, 1, 3, 11, 45, 195, 887, 4169, 20093, 98757, 493123, 2494491, 12756393, 65838591, 342513423, 1794185745, 9455438585, 50097517625, 266696171475, 1425833490011, 7652256085781, 41211824095067, 222653745911847

Offset

1,3

Comments

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

Links

Table of n, a(n) for n=1..23.

Index entries for reversions of series

Crossrefs

Sequence in context: A151128 A049183 A049166 * A049155 A063024 A217887

Adjacent sequences: A049169 A049170 A049171 * A049173 A049174 A049175

Keyword

nonn

Author

Olivier Gérard

Extensions

NAME corrected by R. J. Mathar, Jul 23 2023

Status

approved