Generalized Stirling number triangle of first kind.

Terms

a(0) =1a(1) =-2a(2) =1a(3) =6a(4) =-5a(5) =1a(6) =-24a(7) =26a(8) =-9a(9) =1a(10) =120a(11) =-154a(12) =71a(13) =-14a(14) =1a(15) =-720a(16) =1044a(17) =-580a(18) =155a(19) =-20a(20) =1a(21) =5040a(22) =-8028a(23) =5104a(24) =-1665a(25) =295a(26) =-27a(27) =1a(28) =-40320a(29) =69264