Triangle read by rows: T(n, k) = n! * Sum_{j=0..n-1} binomial(k - 1, j) / (j + 1).

Terms

a(0) =0a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =5a(7) =6a(8) =9a(9) =14a(10) =14a(11) =24a(12) =36a(13) =56a(14) =90a(15) =94a(16) =120a(17) =180a(18) =280a(19) =450a(20) =744a(21) =444a(22) =720a(23) =1080a(24) =1680a(25) =2700a(26) =4464a(27) =7560a(28) =3828a(29) =5040