/sci/ - Science & Math

The generating function of a standard tetahedra die is: x^1 +x^2 +x^3 + x^4 and a standard cubic die is x^1 +x^2 +x^3 + x^4 +x^5+x^6.

So the sum would be: 2x^1+2x^2+2x^3+2x^4+x^5+x^6

How do I come up with the other dice that would generate this?

Am I even on the right track?