Expansion of g.f.: 1/((1 - x - x^2 + x^4 - x^6)*(1 - x^2 + x^4 + x^5 - x^6)).

Terms

a(0) =1a(1) =1a(2) =3a(3) =4a(4) =6a(5) =8a(6) =12a(7) =15a(8) =25a(9) =35a(10) =56a(11) =84a(12) =130a(13) =192a(14) =294a(15) =432a(16) =654a(17) =972a(18) =1466a(19) =2192a(20) =3308a(21) =4953a(22) =7463a(23) =11185a(24) =16820a(25) =25224a(26) =37906a(27) =56868a(28) =85445a(29) =128239