∑π⊆B⁡(r,r,r)π⁢ cyclically symmetricq|π|=∏h=1r1-q3⁢h-11-q3⁢h-2⁢∏1≤h<j≤r1-q3⁢(h+2⁢j-1)1-q3⁢(h+j-1)=∏h=1r(1-q3⁢h-11-q3⁢h-2⁢∏j=hr1-q3⁢(r+h+j-1)1-q3⁢(2⁢h+j-1)).