30517578124domain: NAppears in sequencesa(n) = 5^n - 1.at n=15A024049a(n) = 4*a(n-1) + 5*a(n-2) for n > 1, with a(0) = 2 and a(1) = 4.at n=15A087404a(n) = 0^n + 5^n - 1.at n=15A103455a(1) = 1, for n >= 2: a(n) = n^(a(n-1)) - 1.at n=4A175982