Triangle of derivatives of the Niven polynomials evaluated at 0.

Terms

a(0) =1a(1) =1a(2) =-2a(3) =1a(4) =-6a(5) =12a(6) =1a(7) =-12a(8) =60a(9) =-120a(10) =1a(11) =-20a(12) =180a(13) =-840a(14) =1680a(15) =1a(16) =-30a(17) =420a(18) =-3360a(19) =15120a(20) =-30240a(21) =1a(22) =-42a(23) =840a(24) =-10080a(25) =75600a(26) =-332640a(27) =665280a(28) =1a(29) =-56