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A049185 Revert transform of 2*(1 + x + x^2 + x^6 + x^7)-1/(1-x). 0
1, 1, 3, 9, 33, 127, 517, 2171, 9359, 41139, 183749, 831479, 3803859, 17563853, 81747331, 383116181, 1806427061, 8563227837, 40787427055, 195106310221, 936890791253, 4514624943827, 21823938003449, 105804610564879 (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

CROSSREFS

Sequence in context: A138178 A063027 A148998 * A049162 A049176 A049151

Adjacent sequences:  A049182 A049183 A049184 * A049186 A049187 A049188

KEYWORD

nonn

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified September 25 13:01 EDT 2020. Contains 337344 sequences. (Running on oeis4.)