Number of meaningful differential operations of the n-th order on the space R^8.

Terms

a(0) =8a(1) =14a(2) =24a(3) =42a(4) =72a(5) =126a(6) =216a(7) =378a(8) =648a(9) =1134a(10) =1944a(11) =3402a(12) =5832a(13) =10206a(14) =17496a(15) =30618a(16) =52488a(17) =91854a(18) =157464a(19) =275562a(20) =472392a(21) =826686a(22) =1417176a(23) =2480058a(24) =4251528a(25) =7440174a(26) =12754584a(27) =22320522a(28) =38263752a(29) =66961566