79522domain: NAppears in sequencesEven semiprimes of the form prime(n)*prime(n+1) - 1.at n=7A103533Numbers k such that lcm(1,2,3,...,k)/17 equals the denominator of the k-th harmonic number H(k).at n=32A112820Product of twin primes minus 1.at n=18A120875Semiprimes which are the product of a twin prime pair minus one.at n=7A269663