136890000domain: NAppears in sequencesNumber of n X 6 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 0 1 vertically.at n=24A208140Number of set partitions of [n] such that i-j is a multiple of six for all i,j belonging to the same block.at n=26A275073