79378domain: NAppears in sequencesNumbers k such that 5^k + 6 is prime.at n=22A089142-2-Knödel numbers.at n=43A225506Sequence lists numbers k > 1 such that k^4 == d(k) (mod sigma(k)), where d = A000005 and sigma = A000203.at n=36A323251Numbers k such that k + sopfr(k) is a cube.at n=38A389862