726440

Appears in sequences

• Numbers n such that sigma(n) = 8*phi(n).at n=34A104901
• Third column (k=2) of triangle A134832 (circular succession numbers).at n=9A134515
• a(n) = A000108(n)*A006130(n), where A000108 is the Catalan numbers and A006130(n) = A006130(n-1) + 3*A006130(n-2).at n=8A200312