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

Terms

a(0) =1a(1) =2a(2) =5a(3) =2a(4) =14a(5) =14a(6) =2a(7) =42a(8) =72a(9) =27a(10) =2a(11) =132a(12) =330a(13) =220a(14) =44a(15) =2a(16) =429a(17) =1430a(18) =1430a(19) =520a(20) =65a(21) =2a(22) =1430a(23) =6006a(24) =8190a(25) =4550a(26) =1050a(27) =90a(28) =2a(29) =4862