Triangle of (Gaussian) q-binomial coefficients for q=-21.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =-20a(5) =1a(6) =1a(7) =421a(8) =421a(9) =1a(10) =1a(11) =-8840a(12) =186082a(13) =-8840a(14) =1a(15) =1a(16) =185641a(17) =82053322a(18) =82053322a(19) =185641a(20) =1a(21) =1a(22) =-3898460a(23) =36185700643a(24) =-759813761720a(25) =36185700643a(26) =-3898460a(27) =1a(28) =1a(29) =81867661