Number of meaningful differential operations of the k-th order on the space R^12.

Terms

a(0) =12a(1) =22a(2) =40a(3) =74a(4) =136a(5) =252a(6) =464a(7) =860a(8) =1584a(9) =2936a(10) =5408a(11) =10024a(12) =18464a(13) =34224a(14) =63040a(15) =116848a(16) =215232a(17) =398944a(18) =734848a(19) =1362080a(20) =2508928a(21) =4650432a(22) =8566016a(23) =15877568a(24) =29246208a(25) =54209408a(26) =99852800a(27) =185082496a(28) =340918784a(29) =631911168