520320domain: NAppears in sequencesTotal number of "humps" in all A005316(2n) open meanders with 2n crossings.at n=8A077056Numbers n such that (n, sigma(n), tau(n)) lies on a sphere with integral radius centered at the origin, i.e., n^2 + sigma(n)^2 + tau(n)^2 is a square.at n=9A243455