811240domain: NAppears in sequencesNumber of reversible strings with n-1 beads of 2 colors. 6 beads are black. Strings are not palindromic.at n=28A032093Number of nX5 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 1 1 vertically.at n=11A207690Number of n-element subsets of [n+6] having an even sum.at n=29A282082