56454

Appears in sequences

• usigma(n) = 2n + d(n), where d(n) is the number of divisors of n.at n=23A063829
• Number of planar triangular n X n X n nonnegative integer grids with mirror symmetry about one altitude with every similarly oriented 5 X 5 X 5 subtriangle summing to 12.at n=10A154086
• Numbers such that the largest prime factor equals the sum of the 4th power of the other prime factors.at n=26A244344
• The least positive integer in A055744 divisible by A008578(n).at n=25A256430
• Numbers A055744(n) such that for any k < n, A055744(k) and A055744(n) do not have all their prime factors in common.at n=22A256431
• Numbers k such that s(k) = 2*k, where s(k) is the sum of divisors of k that have a square factor (A162296).at n=28A322609