Generalized Stirling number triangle of first kind.

Terms

a(0) =1a(1) =-5a(2) =1a(3) =50a(4) =-15a(5) =1a(6) =-750a(7) =275a(8) =-30a(9) =1a(10) =15000a(11) =-6250a(12) =875a(13) =-50a(14) =1a(15) =-375000a(16) =171250a(17) =-28125a(18) =2125a(19) =-75a(20) =1a(21) =11250000a(22) =-5512500a(23) =1015000a(24) =-91875a(25) =4375a(26) =-105a(27) =1a(28) =-393750000a(29) =204187500