Column 1 of triangle A052308.

Terms

a(0) =1a(1) =-1a(2) =0a(3) =1a(4) =0a(5) =-1a(6) =-1a(7) =0a(8) =4a(9) =8a(10) =2a(11) =-34a(12) =-108a(13) =-160a(14) =189a(15) =2363a(16) =8032a(17) =12277a(18) =-30155a(19) =-347952a(20) =-1464609a(21) =-3099733a(22) =4975748a(23) =96347901a(24) =539113345a(25) =1751884290a(26) =714138346a(27) =-40349734815a(28) =-334283308597