Triangle of Gaussian binomial coefficients [ n,k ] for q = 5.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =6a(5) =1a(6) =1a(7) =31a(8) =31a(9) =1a(10) =1a(11) =156a(12) =806a(13) =156a(14) =1a(15) =1a(16) =781a(17) =20306a(18) =20306a(19) =781a(20) =1a(21) =1a(22) =3906a(23) =508431a(24) =2558556a(25) =508431a(26) =3906a(27) =1a(28) =1a(29) =19531