77636domain: NAppears in sequencesNumber of nX1 0..1 arrays with exactly floor(nX1/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..1 order.at n=22A222283Number of length n+4 0..1 arrays with at most one downstep in every 4 consecutive neighbor pairs.at n=14A255988