Triangle read by rows. T(n, k) = Sum_{j=0..k} (n!/j!).

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =4a(5) =5a(6) =6a(7) =12a(8) =15a(9) =16a(10) =24a(11) =48a(12) =60a(13) =64a(14) =65a(15) =120a(16) =240a(17) =300a(18) =320a(19) =325a(20) =326a(21) =720a(22) =1440a(23) =1800a(24) =1920a(25) =1950a(26) =1956a(27) =1957a(28) =5040a(29) =10080