Triangle T(n, k, q) = (1-q^n)*( binomial(n, k) - 1 ) + 1, with q = 4, read by rows.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =-14a(5) =1a(6) =1a(7) =-125a(8) =-125a(9) =1a(10) =1a(11) =-764a(12) =-1274a(13) =-764a(14) =1a(15) =1a(16) =-4091a(17) =-9206a(18) =-9206a(19) =-4091a(20) =1a(21) =1a(22) =-20474a(23) =-57329a(24) =-77804a(25) =-57329a(26) =-20474a(27) =1a(28) =1a(29) =-98297