Lower triangular array T(n,k) generator for group of arrays related to A001147 and A102625.

Terms

a(0) =1a(1) =-1a(2) =1a(3) =-1a(4) =-2a(5) =1a(6) =-3a(7) =-3a(8) =-3a(9) =1a(10) =-15a(11) =-12a(12) =-6a(13) =-4a(14) =1a(15) =-105a(16) =-75a(17) =-30a(18) =-10a(19) =-5a(20) =1a(21) =-945a(22) =-630a(23) =-225a(24) =-60a(25) =-15a(26) =-6a(27) =1a(28) =-10395a(29) =-6615