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

Terms

a(0) =1a(1) =3a(2) =15a(3) =5a(4) =105a(5) =77a(6) =7a(7) =945a(8) =1044a(9) =234a(10) =9a(11) =10395a(12) =14784a(13) =5390a(14) =550a(15) =11a(16) =135135a(17) =227877a(18) =113126a(19) =19760a(20) =1105a(21) =13a(22) =2027025a(23) =3862305a(24) =2371845a(25) =586425a(26) =58275a(27) =1995a(28) =15a(29) =34459425