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

Terms

a(0) =1a(1) =0a(2) =1a(3) =7a(4) =29a(5) =98a(6) =316a(7) =1043a(8) =3536a(9) =12083a(10) =41168a(11) =139750a(12) =473824a(13) =1607014a(14) =5453022a(15) =18506947a(16) =62808496a(17) =213144034a(18) =723295969a(19) =2454483506a(20) =8329290739a(21) =28265565587a(22) =95919580313a(23) =325504019213