83201domain: NAppears in sequencesa(n) = 52*n^2 + 1.at n=40A158644Numbers that can be written in more than 1 way as p^2 + 3pq + q^2 with primes p < q.at n=32A218795Numbers k such that (4*10^k + 173)/3 is prime.at n=27A280848