96951758924domain: NAppears in sequencesa(n) = 7^n + n^7.at n=13A001596Numbers of the form 7^p + p^7 for p prime.at n=5A097317Numbers of the form a^b+b^a, a and b are odd primes, b > a.at n=11A173055Numbers of the form a^b+b^a, a and b are primes.at n=25A173056