50331650domain: NAppears in sequencesA007318 * A143097.at n=22A143099a(n) = 3*2^n + 2.at n=24A164094Number of (n+1) X 2 0..2 arrays with every 2 X 2 subblock having the same number of equal diagonal or antidiagonal elements, and new values 0..2 introduced in row major order.at n=11A205354