Triangle of Stirling numbers of order 4.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =35a(6) =1a(7) =126a(8) =1a(9) =336a(10) =1a(11) =792a(12) =1a(13) =1749a(14) =5775a(15) =1a(16) =3718a(17) =45045a(18) =1a(19) =7722a(20) =231231a(21) =1a(22) =15808a(23) =981981a(24) =1a(25) =32071a(26) =3741738a(27) =2627625a(28) =1a(29) =64702