80655domain: NAppears in sequencesa(n)=a(n-1)^2*2^n-1 where a(0)=1.at n=4A073589a(n) = 2401*n^2 - 980*n + 99.at n=5A157375a(n) = (8*n+3)*(8*n+5).at n=35A177065Numbers n such that the number of divisors of n+1 divides n and the number of divisors of n divides n+1.at n=10A272353