352837domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form 9*n^2 + 1.at n=26A156226Primes of the form p^2 + 2*p + 2 where p is prime.at n=26A157467Smallest prime p == 5 (mod 8) such that Q(sqrt(p)) has class number 2n+1.at n=27A355877a(n) = Sum_{d|n} (n/d)^d * binomial(d+n-1,d).at n=10A363668Prime numbersat n=30202