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

Terms

a(0) =1a(1) =2a(2) =5a(3) =13a(4) =34a(5) =89a(6) =234a(7) =615a(8) =1616a(9) =4246a(10) =11156a(11) =29314a(12) =77026a(13) =202394a(14) =531811a(15) =1397387a(16) =3671781a(17) =9647988a(18) =25351094a(19) =66612640a(20) =175031647a(21) =459913889a(22) =1208471657a(23) =3175385173a(24) =8343655339a(25) =21923823599a(26) =57607130438a(27) =151368736483a(28) =397737124030