Expansion of (1 - 4*x + 6*x^2)/(1 - 2*x)^2.

Terms

a(0) =1a(1) =0a(2) =2a(3) =8a(4) =24a(5) =64a(6) =160a(7) =384a(8) =896a(9) =2048a(10) =4608a(11) =10240a(12) =22528a(13) =49152a(14) =106496a(15) =229376a(16) =491520a(17) =1048576a(18) =2228224a(19) =4718592a(20) =9961472a(21) =20971520a(22) =44040192a(23) =92274688a(24) =192937984a(25) =402653184a(26) =838860800a(27) =1744830464a(28) =3623878656a(29) =7516192768