Triangle of q-binomial coefficients for q=-3.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =-2a(5) =1a(6) =1a(7) =7a(8) =7a(9) =1a(10) =1a(11) =-20a(12) =70a(13) =-20a(14) =1a(15) =1a(16) =61a(17) =610a(18) =610a(19) =61a(20) =1a(21) =1a(22) =-182a(23) =5551a(24) =-15860a(25) =5551a(26) =-182a(27) =1a(28) =1a(29) =547