Expansion of 1/(1 - 4*x*(1+x)^2)^(7/2).

Terms

a(0) =1a(1) =14a(2) =154a(3) =1442a(4) =12306a(5) =98448a(6) =751338a(7) =5530800a(8) =39567066a(9) =276569216a(10) =1896366472a(11) =12793873820a(12) =85126910050a(13) =559668331068