76222domain: NAppears in sequences144n^2 + 2n.at n=22A158132Expansion of (-x^2 + 3*x - 1)/(x^3 - x^2 + 3*x - 1).at n=14A200752a(n) = Sum_{d|n} lcm(sigma(d), pod(d)) where sigma(k) is the sum of divisors of k (A000203) and pod(k) is the product of divisors of k (A007955).at n=17A334794