87972domain: NAppears in sequencesNumber of nX3 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 0 and 1 1 1 vertically.at n=8A207341Numbers which can written in exactly four ways as a sum of two distinct nonzero pentagonal numbers.at n=14A333014Fifth Lie-Betti number of a path graph on n vertices.at n=21A364579