Signed array used for numerators of generating functions of the column sequences of array A090452.

Terms

a(0) =1a(1) =3a(2) =-2a(3) =2a(4) =6a(5) =-9a(6) =3a(7) =15a(8) =0a(9) =-24a(10) =18a(11) =-4a(12) =5a(13) =69a(14) =-75a(15) =-20a(16) =60a(17) =-30a(18) =5a(19) =63a(20) =217a(21) =-462a(22) =225a(23) =80a(24) =-120a(25) =45a(26) =-6a(27) =14a(28) =462a(29) =300