Triangle read by rows: T(n,k) is the number of endofunctions on n objects with k components.

Terms

a(0) =1a(1) =2a(2) =1a(3) =4a(4) =2a(5) =1a(6) =9a(7) =7a(8) =2a(9) =1a(10) =20a(11) =17a(12) =7a(13) =2a(14) =1a(15) =51a(16) =48a(17) =21a(18) =7a(19) =2a(20) =1a(21) =125a(22) =127a(23) =60a(24) =21a(25) =7a(26) =2a(27) =1a(28) =329a(29) =352