77832domain: NAppears in sequencesa(n) = 81*n^2 - 9.at n=30A157909Numbers of the form k + wt(k) for exactly four distinct k, where wt(k) = A000120(k) is the binary weight of k.at n=9A227915Sum of the positive differences of the cubed parts in each partition of n into two parts.at n=24A335639