2426112domain: NAppears in sequencesProduct_{k=1..n} floor(2*n/k - 1).at n=14A207646Composite numbers such that Sum_{i=1..k} (1 + 1/p_i) - Product_{i=1..k} (1 + 1/p_i) is an integer, where p_i are the k prime factors of n (with multiplicity).at n=16A226365