177264449domain: NAppears in sequencesa(n) = n^(n+1)+(n+1)^n.at n=8A051442a(n) = n^9 + 9^n.at n=8A185277a(n) = 8^n + n^8.at n=9A198401Leyland numbers which are products of two distinct primes.at n=12A356423