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A049139 Revert transform of (1 - x - 2x^2 + x^3)/(1 - 2x^2). 0
1, 1, 2, 6, 20, 72, 272, 1063, 4262, 17432, 72448, 305074, 1298812, 5581188, 24175560, 105448157, 462745106, 2041634108, 9050879192, 40296196096, 180099939464, 807757872276, 3634378951656, 16399912908504, 74201196229816 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..25.

Index entries for reversions of series

CROSSREFS

Sequence in context: A049129 A063376 A161168 * A071356 A141200 A186996

Adjacent sequences:  A049136 A049137 A049138 * A049140 A049141 A049142

KEYWORD

nonn

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified November 19 12:38 EST 2018. Contains 317351 sequences. (Running on oeis4.)