79085411domain: NAppears in sequencesNumerator of Sum_{p prime, p-1|n} 1/p.at n=59A027759Numerator of sum_{p prime, p-1 divides 2*n} 1/p.at n=29A027761Denominator of Bernoulli_n multiplied by the sum of the associated inverse primes in the Staudt-Clausen theorem, n=1, 2, 4, 6, 8, 10,...at n=30A166306