82012domain: NAppears in sequencesNumber of ways associated with A088959.at n=33A088111Long leg B of primitive Pythagorean triangles such that perimeters are Averages of twin prime pairs, q=p+1, a=q^2-p^2, c=q^2+p^2, b=2*p*q, s=a+b+c, s-+1 are primes.at n=19A155174a(n) = Sum_{d|n} d^2 * (d+1)/2.at n=51A278403