30275911domain: NAppears in sequencesa(n) = 7^n - 6^n.at n=9A016169Nexus numbers (n+1)^9-n^9.at n=6A022525Difference of two positive 9th powers.at n=16A181128Triangular array read by rows, T(n,k) is the number of functions from {1,2,...,n} into {1,2,...,n} with maximum value of k.at n=42A199656