32580250domain: NAppears in sequencesa(n) = n * (16*n^2+20*n+5)^2.at n=10A322745Numbers k such that P(k)^3 | k and P(k+1)^2 | (k+1), where P(k) = A006530(k) is the largest prime dividing k.at n=25A354564Numbers k such that P(k)^4 | k and P(k+1)^2 | (k+1), where P(k) = A006530(k) is the largest prime dividing k.at n=3A354566