Riordan array (1/(1+x)^3, x/(1+x)^3).

Terms

a(0) =1a(1) =-3a(2) =1a(3) =6a(4) =-6a(5) =1a(6) =-10a(7) =21a(8) =-9a(9) =1a(10) =15a(11) =-56a(12) =45a(13) =-12a(14) =1a(15) =-21a(16) =126a(17) =-165a(18) =78a(19) =-15a(20) =1a(21) =28a(22) =-252a(23) =495a(24) =-364a(25) =120a(26) =-18a(27) =1a(28) =-36a(29) =462