Triangle read by rows, coefficients of polynomials related to the Springer numbers A001586.

Terms

a(0) =1a(1) =-1a(2) =2a(3) =-3a(4) =-4a(5) =4a(6) =11a(7) =-18a(8) =-12a(9) =8a(10) =57a(11) =88a(12) =-72a(13) =-32a(14) =16a(15) =-361a(16) =570a(17) =440a(18) =-240a(19) =-80a(20) =32a(21) =-2763a(22) =-4332a(23) =3420a(24) =1760a(25) =-720a(26) =-192a(27) =64a(28) =24611a(29) =-38682