13060702208domain: NAppears in sequencesa(n) = 2^n + 6^n.at n=13A074601a(n) is the (n-1)st smallest number that is the sum of 2 distinct positive n-th powers.at n=11A088727Expansion of (1-6*x+4*x^2)/((1-2*x)*(1-6*x)).at n=14A092807