34030327domain: NPropertiesPrimalityPrimeyesAppears in sequencesOdd numbers k with the property that (2^k + k^2) == 0 (mod (k+2)).at n=9A156038Odd prime numbers p with the property that (2^p + p^2) == 0 (mod (p+2)).at n=2A156048Prime numbersat n=2091107