640472606domain: NAppears in sequencesNumber of (n+1)X(4+1) 0..1 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise.at n=6A238251Number of (n+1)X(7+1) 0..1 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise.at n=3A238254