65197domain: NAppears in sequencesNumbers that are the sum of 11 positive 10th powers.at n=18A004811Number of restricted forests in Moebius ladder M_n.at n=4A020872Products (semiprimes) of two distinct double-safe primes.at n=23A157356a(n) = Sum_{k=1..n} phi(gcd(k, n))^(n/gcd(k, n) - 1).at n=41A342542