Expansion of 1/(x^k*(1-x-2*x^(k+1))) for k=6.

Terms

a(0) =1a(1) =3a(2) =5a(3) =7a(4) =9a(5) =11a(6) =13a(7) =15a(8) =21a(9) =31a(10) =45a(11) =63a(12) =85a(13) =111a(14) =141a(15) =183a(16) =245a(17) =335a(18) =461a(19) =631a(20) =853a(21) =1135a(22) =1501a(23) =1991a(24) =2661a(25) =3583a(26) =4845a(27) =6551a(28) =8821a(29) =11823