5223002148domain: NAppears in sequencesTriangle T(n,k) read by rows: coefficient [x^k] of the polynomial Product_{i=1..n} (x + q^i) in row n and q = 3.at n=22A173007(n-1)-st elementary symmetric function of {3,9,...,3^n}.at n=5A203148Wiener index of the n X n X n grid graph.at n=26A292045