65622domain: NAppears in sequencesSquarefree numbers sandwiched between two brilliant numbers.at n=14A085706a(n) = Sum_{d|n} tau(d)^d, where tau(n) is the number of divisors of n.at n=7A344081If n = Sum 2^e(k), then a(n) = Sum 2^a(e(k)), with a(0) = 1.at n=31A381957