Triangle read by rows: expansion of e.g.f. (1 - x)/(exp(t)*(1 - x*exp(t*(1 - x)))).

Terms

a(0) =1a(1) =-1a(2) =1a(3) =1a(4) =-1a(5) =1a(6) =-1a(7) =1a(8) =1a(9) =1a(10) =1a(11) =-1a(12) =1a(13) =7a(14) =1a(15) =-1a(16) =1a(17) =1a(18) =21a(19) =21a(20) =1a(21) =1a(22) =-1a(23) =1a(24) =51a(25) =161a(26) =51a(27) =1a(28) =-1a(29) =1