84311domain: NAppears in sequencesa(n) = pq + pr + qr with p = prime(n), q = prime(n+1), and r = prime(n+2).at n=37A127345Composites in A127345.at n=23A127347Numbers k such that 2*k + 1 divides 2^(k+1) - 1.at n=36A246648Denominator of harmonic mean of 3 consecutive primes. Numerators are A331259.at n=37A331260