249307domain: NAppears in sequencesNumbers n such that n, n+1, n+2 are all of the form p*q^2 for distinct primes p,q.at n=24A178032a(n) = (p_n)^2 * p_{n+1}, where p_n is the n-th prime, A000040(n).at n=17A251720Number of 6-element subsets of [n] whose sum is a triangular number.at n=34A320852