48530806610domain: NAppears in sequencesa(n) is the smallest even number m having n distinct odd prime divisors p_1, p_2, ..., p_n, each of which (p_i; i=1..n) has the property that there exists a k_i (0 < k_i < p_i-1) such that p_i - k_i | m - k_i.at n=7A309781