33802596domain: NAppears in sequencesa(n) = n^2 * (n+1)^2 * (n+2)^2 = 36*A001249(n-1).at n=17A099764Number of 3 X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 0 1 vertically.at n=13A207600