Number of independent polynomial invariants of matrix of order n.

Terms

a(0) =1a(1) =1a(2) =3a(3) =6a(4) =17a(5) =40a(6) =125a(7) =354a(8) =1159a(9) =3774a(10) =13113a(11) =46426a(12) =171027a(13) =644038a(14) =2493848a(15) =9867688a(16) =39922991a(17) =164747459a(18) =693093407a(19) =2968918400a(20) =12940917244a(21) =57353242370a(22) =258306634422