Generalized Stirling number triangle of first kind.

Terms

a(0) =1a(1) =-7a(2) =1a(3) =56a(4) =-15a(5) =1a(6) =-504a(7) =191a(8) =-24a(9) =1a(10) =5040a(11) =-2414a(12) =431a(13) =-34a(14) =1a(15) =-55440a(16) =31594a(17) =-7155a(18) =805a(19) =-45a(20) =1a(21) =665280a(22) =-434568a(23) =117454a(24) =-16815a(25) =1345a(26) =-57a(27) =1a(28) =-8648640a(29) =6314664