Triangle T(n,k) read by rows, where e.g.f. for T(n,k) is exp((1+y)*x)/(1-x).

Terms

a(0) =1a(1) =2a(2) =1a(3) =5a(4) =4a(5) =1a(6) =16a(7) =15a(8) =6a(9) =1a(10) =65a(11) =64a(12) =30a(13) =8a(14) =1a(15) =326a(16) =325a(17) =160a(18) =50a(19) =10a(20) =1a(21) =1957a(22) =1956a(23) =975a(24) =320a(25) =75a(26) =12a(27) =1a(28) =13700a(29) =13699