Triangle read by rows: T(n,k) is the coefficient [x^k] of (-1)^n times the characteristic polynomial of the Cartan matrix for the root system D_n.
A129862
Triangle read by rows: T(n,k) is the coefficient [x^k] of (-1)^n times the characteristic polynomial of the Cartan matrix for the root system D_n.
Terms
- a(0) =1a(1) =2a(2) =-1a(3) =4a(4) =-4a(5) =1a(6) =4a(7) =-10a(8) =6a(9) =-1a(10) =4a(11) =-20a(12) =21a(13) =-8a(14) =1a(15) =4a(16) =-34a(17) =56a(18) =-36a(19) =10a(20) =-1a(21) =4a(22) =-52a(23) =125a(24) =-120a(25) =55a(26) =-12a(27) =1a(28) =4a(29) =-74
External references
- oeis: A129862