Number of polynomial symmetric functions of matrix of order n under separate row and column permutations.

A007716

Number of polynomial symmetric functions of matrix of order n under separate row and column permutations.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =10a(4) =33a(5) =91a(6) =298a(7) =910a(8) =3017a(9) =9945a(10) =34207a(11) =119369a(12) =429250a(13) =1574224a(14) =5916148a(15) =22699830a(16) =89003059a(17) =356058540a(18) =1453080087a(19) =6044132794a(20) =25612598436a(21) =110503627621a(22) =485161348047

External references