Triangle: p(x) = (1 - t/c)*(1 - t)^(-x - b); c = 1/2; b = 1.

Terms

a(0) =1a(1) =-1a(2) =1a(3) =-2a(4) =-1a(5) =1a(6) =-6a(7) =-7a(8) =0a(9) =1a(10) =-24a(11) =-38a(12) =-13a(13) =2a(14) =1a(15) =-120a(16) =-226a(17) =-125a(18) =-15a(19) =5a(20) =1a(21) =-720a(22) =-1524a(23) =-1076a(24) =-285a(25) =-5a(26) =9a(27) =1a(28) =-5040a(29) =-11628