417810domain: NAppears in sequencesTriangle T(n,m) read by rows: number of n X m binary matrices with no rows or columns in which all entries are the same (n >= 1, 1 <= m <= n).at n=13A283654Number of compositions of 7*n into parts 3 and 7.at n=14A373909Expansion of 1 / ((1-x)^3 - x^7).at n=28A392544