52099domain: NAppears in sequencesNumbers n such that 6*10^n + 5*R_n + 2 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=10A103040Semiprimes in A054567.at n=37A113692Number of unlabeled simple graphs covering n vertices with a unique undirected cycle of length > 2.at n=14A372191