Triangle read by rows: T(n,m) (1<=m<=n) = number of surjections f:[n]->[m] with f(n) != f(j), j<n.

Terms

a(0) =1a(1) =0a(2) =2a(3) =0a(4) =2a(5) =6a(6) =0a(7) =2a(8) =18a(9) =24a(10) =0a(11) =2a(12) =42a(13) =144a(14) =120a(15) =0a(16) =2a(17) =90a(18) =600a(19) =1200a(20) =720a(21) =0a(22) =2a(23) =186a(24) =2160a(25) =7800a(26) =10800a(27) =5040a(28) =0a(29) =2