589916domain: NAppears in sequencesNumber of length 4+2 0..n arrays with no three consecutive terms having the sum of any two elements equal to twice the third.at n=8A248465Number of (n+1) X (4+1) 0..1 arrays with every 2 X 2 subblock diagonal minus antidiagonal sum nondecreasing horizontally and vertically.at n=16A253155