539904domain: NAppears in sequencesa(n) = binomial(n+2,3)*4^3.at n=35A141478Expansion of e.g.f. -1/(1-LambertW(-x)).at n=8A277458Number of order n magic triangles composed of the numbers from 1 to n^2 in which the sum of each 2 X 2 subtriangle is the same, counted up to rotations and reflections.at n=4A375416