91971domain: NAppears in sequencesNumber of different shapes formed by bending a piece of wire of length n in the plane.at n=22A066372a(0) = 1, a(n+1) = a(n) + next prime larger than a(n).at n=15A074839Smallest k such that k^3 -1 is a squarefree number with n prime divisors. a(n) = A088029(n)^(1/3).at n=9A088030