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

Terms

a(0) =1a(1) =1a(2) =4a(3) =3a(4) =27a(5) =31a(6) =5a(7) =248a(8) =357a(9) =117a(10) =7a(11) =2830a(12) =4742a(13) =2218a(14) =314a(15) =9a(16) =38232a(17) =71698a(18) =42046a(19) =9258a(20) =690a(21) =11a(22) =593859a(23) =1216251a(24) =837639a(25) =243987a(26) =30057a(27) =1329a(28) =13a(29) =10401712