Yes. If n is prime, the divisors of n^2 are n^2, n, and 1, summing to n^2+n+1, exactly as in the definition of A053182. Franklin T. Adams-Watters -----Original Message----- From: Claudio Meller <claudiomeller at gmail.com> Question : Are the terms of A053182 : primes numbers n such that the sum of the divisors of n^2 is prime.? http://oeis.org/A053182