4486784401domain: NAppears in sequencesa(n) = n^(n+1)+(n+1)^n.at n=9A051442a(n) = 10^n + n^10.at n=9A177068a(n) = n^9 + 9^n.at n=10A185277Leyland numbers which are products of two distinct primes.at n=15A356423