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

Terms

a(0) =1a(1) =2a(2) =7a(3) =17a(4) =46a(5) =119a(6) =313a(7) =818a(8) =2143a(9) =5609a(10) =14686a(11) =38447a(12) =100657a(13) =263522a(14) =689911a(15) =1806209a(16) =4728718a(17) =12379943a(18) =32411113a(19) =84853394a(20) =222149071a(21) =581593817a(22) =1522632382a(23) =3986303327a(24) =10436277601a(25) =27322529474a(26) =71531310823a(27) =187271402993a(28) =490282898158