80424domain: NAppears in sequencesAliquot sequence starting at 660.at n=27A014362Number of permutations of length n which avoid the patterns 1234, 2341, 4132.at n=12A116775Number of 3 X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 0 and 1 1 1 vertically.at n=12A207347