307063domain: NAppears in sequencesArray read by antidiagonals: T(n,k) is the number of {-1,0,1} n X k matrices with all rows and columns summing to zero up to permutations of rows.at n=70A377063Number of 4 X n 0..2 matrices with row sums n and column sums 4 up to permutations of rows.at n=7A377066