Expansion of 1/(1 - x^3/(1-x)^7).

Terms

a(0) =1a(1) =0a(2) =0a(3) =1a(4) =7a(5) =28a(6) =85a(7) =224a(8) =567a(9) =1485a(10) =4117a(11) =11802a(12) =33909a(13) =96182a(14) =269402a(15) =750275a(16) =2090728a(17) =5845015a(18) =16384908a(19) =45973701a(20) =128944042a(21) =361364501a(22) =1012168575a(23) =2834690172a(24) =7939970075a(25) =22244001961a(26) =62323608147a(27) =174620915138a(28) =489240430938