Upper half of Hankel determinant number wall for A004148.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =2a(8) =0a(9) =0a(10) =1a(11) =4a(12) =0a(13) =0a(14) =-1a(15) =1a(16) =8a(17) =4a(18) =-2a(19) =-1a(20) =-1a(21) =1a(22) =17a(23) =7a(24) =3a(25) =-3a(26) =-1a(27) =-1a(28) =1a(29) =37