176435domain: NAppears in sequencesa(n) = (p^3 - p^2)/2, where p = prime(n).at n=19A138416a(n) = 1225*n^2 + 35.at n=12A158733Values A such that p=prime(n) satisfies binomial(2p-1, p-1) == 1 + A*p (mod p^4).at n=19A260209