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

Terms

a(0) =1a(1) =6a(2) =42a(3) =287a(4) =1968a(5) =13488a(6) =92449a(7) =633654a(8) =4343130a(9) =29768255a(10) =204034656a(11) =1398474336a(12) =9585285697a(13) =65698525542a(14) =450304393098