704613domain: NAppears in sequencesa(n) = (4*n+3)*(4*n+5)*(4*n+7).at n=21A133767Number of n X 5 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 0 1 vertically.at n=20A207166