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%I #10 Aug 05 2024 15:04:42
%S 4,26,122,572,2754,13372,65350,321314,1587646,7876706,39213336,
%T 195797006,980139194,4917428112,24719569686,124480093754,627818178180,
%U 3170837715984
%N Euler characteristic of relative homology of some varieties related to cluster algebras of type D.
%C The true Euler characteristic alternates in sign. This sequence is the absolute value.
%Y Cf. A171711 (similar sequence in type A).
%K nonn,more
%O 2,1
%A _F. Chapoton_, Jan 30 2013