77304domain: NAppears in sequencesNumbers k such that 7*R_k + 10 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=16A256906E.g.f. satisfies A(x) = -log(1 - x * exp(A(x))) * exp(2 * A(x)).at n=5A357344