2176786432domain: NAppears in sequencesa(n) = 2^n + 6^n.at n=12A074601Expansion of (1-6*x+4*x^2)/((1-2*x)*(1-6*x)).at n=13A092807a(n) = Sum_{d|n, n/d odd} d^12 for n > 0.at n=5A321820