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A049184 Revert transform of -2(1-x+x^2+x^4-x^5-x^7)+1+1/(1+x). 0
1, 1, 3, 11, 43, 181, 797, 3623, 16883, 80211, 387069, 1891993, 9348037, 46611111, 234246003, 1185284981, 6033612461, 30877015405, 158761428015, 819773798543, 4249143243487, 22100975481441, 115316005733921, 603418314889419 (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..24.

Index entries for reversions of series

PROG

(PARI) a(n)=if(n<1, 0, polcoeff(serreverse(x*(1-2*x^2*(1+x-x^3-x^4-x^5)+O(x^n))/(1+x)), n))

CROSSREFS

Sequence in context: A151098 A277220 A151099 * A049169 A049175 A049158

Adjacent sequences:  A049181 A049182 A049183 * A049185 A049186 A049187

KEYWORD

nonn

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified October 25 01:18 EDT 2020. Contains 338010 sequences. (Running on oeis4.)