1073297domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of nonnegative integer 3 X 3 matrices with sum of elements equal to n, up to rotational symmetry.at n=21A054771Honaker primes of the form k^2 + 1.at n=9A176790Terms of A002496 that are the average of two distinct terms of A002496.at n=4A327741Prime numbersat n=83783