219769200domain: NAppears in sequencesArray read by antidiagonals: T(m,n) = m * Sum(1<=i<=m) (m+n-2+i)!at n=25A211367Number of minimum total dominating sets in the n-triangular honeycomb bishop graph.at n=17A304564Number of minimum total dominating sets in the (3n)-triangular honeycomb bishop graph.at n=6A382777