G.f. A(x) satisfies: A(x) = 1 + x + x^2 + x^3 + x^4 + x^5 * A(x/(1 - x)) / (1 - x)^2.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =3a(7) =7a(8) =15a(9) =31a(10) =63a(11) =129a(12) =277a(13) =651a(14) =1703a(15) =4859a(16) =14581a(17) =44711a(18) =138053a(19) =427709a(20) =1334461a(21) =4226501a(22) =13724063a(23) =46110643a(24) =161210421a(25) =586729441a(26) =2213187623a(27) =8591628435a(28) =34081480017a(29) =137398121611