Cardinality of the Weyl alternation set corresponding to the zero-weight in the adjoint representation of the Lie algebra of so(2n).

A234598

Cardinality of the Weyl alternation set corresponding to the zero-weight in the adjoint representation of the Lie algebra of so(2n).

Terms

    a(0) =9a(1) =18a(2) =35a(3) =82a(4) =180a(5) =385a(6) =846a(7) =1853a(8) =4034a(9) =8810a(10) =19249a(11) =42014a(12) =91727a(13) =200298a(14) =437316a(15) =954809a(16) =2084746a(17) =4551801a(18) =9938290a(19) =21699138a(20) =47377577a(21) =103443386a(22) =225856667a(23) =493131922a(24) =1076696324a(25) =2350841633a(26) =5132790390a(27) =11206852917a(28) =24468864530

External references