Triangle of generalized Stirling numbers.

Terms

a(0) =1a(1) =5a(2) =1a(3) =26a(4) =7a(5) =1a(6) =154a(7) =47a(8) =9a(9) =1a(10) =1044a(11) =342a(12) =74a(13) =11a(14) =1a(15) =8028a(16) =2754a(17) =638a(18) =107a(19) =13a(20) =1a(21) =69264a(22) =24552a(23) =5944a(24) =1066a(25) =146a(26) =15a(27) =1a(28) =663696a(29) =241128