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A211166 Euler characteristic of relative homology of some varieties related to cluster algebras of type D. 1
4, 26, 122, 572, 2754, 13372, 65350, 321314, 1587646, 7876706, 39213336, 195797006, 980139194, 4917428112, 24719569686, 124480093754, 627818178180, 3170837715984 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

COMMENTS

The true Euler characteristic alternates in sign. This sequence is the absolute value.

LINKS

Table of n, a(n) for n=2..19.

CROSSREFS

Cf. A171711 (similar sequence in type A).

Sequence in context: A147621 A246854 A267847 * A245460 A261738 A184263

Adjacent sequences:  A211163 A211164 A211165 * A211167 A211168 A211169

KEYWORD

nonn

AUTHOR

F. Chapoton, Jan 30 2013

STATUS

approved

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Last modified May 19 04:06 EDT 2019. Contains 323377 sequences. (Running on oeis4.)