27911domain: NAppears in sequencesa(n) = 12*n^3 + 9*n^2 + 2*n.at n=13A191745Ceiling((10*n+1/n)^n).at n=2A197770a(n) is the number of regions formed by n-secting the angles of a decagon.at n=36A335800Factor balanced numbers. See Comments for definition.at n=18A343153