17528896domain: NAppears in sequencesNumber of triangular nXnXn 0..3 arrays with all rows and diagonals having the same length having the same sum, with corners zero.at n=6A195800T(n,k)=Number of triangular nXnXn 0..k arrays with all rows and diagonals having the same length having the same sum, with corners zero.at n=42A195805