7811750017

Appears in sequences

• Let Dedekind's psi(m) = product of (p+1)p^(e-1) for primes p, where p^e is a factor of m. Iterating psi(m) eventually results in a number of form 2^a*3^b. a(n) is the smallest number that requires n steps to reach such a number.at n=15A019268
• Position of first occurrence of n in A331410.at n=28A329662