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A049172 Revert transform of 2*(1 + x + x^2 + x^4)-1/(1-x). 0
1, 1, 3, 11, 45, 195, 887, 4169, 20093, 98757, 493123, 2494491, 12756393, 65838591, 342513423, 1794185745, 9455438585, 50097517625, 266696171475, 1425833490011, 7652256085781, 41211824095067, 222653745911847 (list; graph; refs; listen; history; text; internal format)
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

STATUS

approved

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Last modified November 24 20:34 EST 2020. Contains 338616 sequences. (Running on oeis4.)