242138449domain: NAppears in sequencesNumbers k that divide 4^k + 3^k.at n=22A045584Numbers k that divide 9^k + 5^k.at n=28A045598Numbers n such that the multiplicative group of integers modulo n is isomorphic to C_m X C_m, m > 1.at n=24A305236Odd terms in A305236.at n=11A307527