Characteristic polynomials of Jacobi coordinates. Triangle read by rows, T(n, k) for 0 <= k <= n.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =2a(6) =6a(7) =11a(8) =11a(9) =6a(10) =24a(11) =50a(12) =61a(13) =50a(14) =24a(15) =120a(16) =274a(17) =379a(18) =379a(19) =274a(20) =120a(21) =720a(22) =1764a(23) =2668a(24) =3023a(25) =2668a(26) =1764a(27) =720a(28) =5040a(29) =13068