Triangle T(n,k) read by rows: coefficients of polynomials P_n(t) defined in Formula section.

Terms

a(0) =1a(1) =1a(2) =0a(3) =3a(4) =0a(5) =0a(6) =11a(7) =9a(8) =0a(9) =1a(10) =53a(11) =120a(12) =60a(13) =40a(14) =9a(15) =309a(16) =1410a(17) =1800a(18) =1590a(19) =885a(20) =216a(21) =2119a(22) =16560a(23) =39960a(24) =55120a(25) =52065a(26) =29016a(27) =7570a(28) =16687a(29) =202755