Number of noncommutative SL(2,C)-invariants of degree n in 5 variables.

Terms

a(0) =1a(1) =0a(2) =1a(3) =1a(4) =5a(5) =16a(6) =65a(7) =260a(8) =1085a(9) =4600a(10) =19845a(11) =86725a(12) =383251a(13) =1709566a(14) =7687615a(15) =34812519a(16) =158614405a(17) =726612216a(18) =3344696501a(19) =15462729645a(20) =71763732545a(21) =334236300200