26388domain: NAppears in sequencesNumbers n such that Catalan(n)-1 is prime.at n=40A053427G.f. satisfies: A(x) = 1 + x/A(-x*A(x)^9)^4.at n=6A213102Numbers k such that Bernoulli number B_{k} has denominator 1919190.at n=17A295595Numbers k such that k^7*2^k + 1 is a prime.at n=18A367560