268380
domain: N
Appears in sequences
- Nonprime numbers k such that k | sigma_3(k) + phi(k)^3.at n=35A055970
- Numbers n such that sigma(n) = 16*phi(n).at n=3A104903
- Triangle read by rows: T(n,k) is number of non-derangement permutations of {1,2,...,n} having k cycles (1 <= k <= n).at n=49A162971
- The Wiener index of the nanostar dendrimer defined pictorially as NS[n] in the Z. S. Irani reference.at n=4A224465