2012174domain: NAppears in sequencesa(n) = 5^n + n^5.at n=9A001593Triangle read by rows: T(n,r) = n^r + r^n (1 <= r <= n).at n=40A093898a(n) = n^9 + 9^n.at n=5A185277Leyland numbers which are products of two distinct primes.at n=8A356423