Number of cubes that can be formed from the points of a cubical grid of n X n X n points.

Terms

a(0) =0a(1) =1a(2) =9a(3) =36a(4) =100a(5) =229a(6) =473a(7) =910a(8) =1648a(9) =2795a(10) =4469a(11) =6818a(12) =10032a(13) =14315a(14) =19907a(15) =27190a(16) =36502a(17) =48233a(18) =62803a(19) =80736a(20) =102550a(21) =128847a(22) =160271a(23) =197516a(24) =241314a(25) =292737a(26) =352591a(27) =421764a(28) =501204a(29) =592257