Determinant of power series with alternate signs of gamma matrix with determinant 2!.

Terms

a(0) =2a(1) =0a(2) =26a(3) =0a(4) =502a(5) =0a(6) =10306a(7) =0a(8) =213902a(9) =0a(10) =4448666a(11) =0a(12) =92558182a(13) =0a(14) =1925894386a(15) =0a(16) =40073418302a(17) =0a(18) =833837682506a(19) =0a(21) =0a(23) =0a(25) =0a(27) =0a(29) =0a(31) =0