90454domain: NAppears in sequencesa(n) = 4394*n - 1820.at n=20A156627Larger of amicable pair m < n defined by t(n) = m and t(m) = n where t(n) = psi(n) - n and psi(n) = A001615(n) is the Dedekind psi function.at n=31A323330Number of odd-length multiset partitions of integer partitions of n.at n=19A358837