Expansion of 3*x/(1 - 2*x^2 - 2*x + x^3).

Terms

a(0) =0a(1) =3a(2) =6a(3) =18a(4) =45a(5) =120a(6) =312a(7) =819a(8) =2142a(9) =5610a(10) =14685a(11) =38448a(12) =100656a(13) =263523a(14) =689910a(15) =1806210a(16) =4728717a(17) =12379944a(18) =32411112a(19) =84853395a(20) =222149070a(21) =581593818a(22) =1522632381a(23) =3986303328a(24) =10436277600a(25) =27322529475a(26) =71531310822a(27) =187271402994a(28) =490282898157