Expansion of (1+x)/(1-x)^12.

Terms

a(0) =1a(1) =13a(2) =90a(3) =442a(4) =1729a(5) =5733a(6) =16744a(7) =44200a(8) =107406a(9) =243542a(10) =520676a(11) =1058148a(12) =2057510a(13) =3848222a(14) =6953544a(15) =12183560a(16) =20764055a(17) =34512075a(18) =56071470a(19) =89224590a(20) =139299615a(21) =213696795a(22) =322561200a(23) =479634480a(24) =703323660a(25) =1018031196a(26) =1455797448a(27) =2058314440a(28) =2879378332