160526499840domain: NAppears in sequencesFor n > 2 , a(n) = a(n-2) + lcm(a(n-2), n-1) with a(1)=2, a(2)=2.at n=25A217662a(0) = 1; for n > 0, a(n) = (prime(n)^2 - 1) * a(n-1).at n=7A318766