1532160domain: NAppears in sequencesa(n) = binomial(n+3,4)*4^4.at n=17A120054Triangular array: rows are the f-vectors of simplicial complexes dual to permutohedra of type D_n.at n=33A145902Number of axis-aligned 2 X 2 squares in the 3D projection of a (3n+1)-dimensional hypercube with side length 2.at n=6A389269