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

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =8a(6) =29a(7) =86a(8) =229a(9) =619a(10) =1836a(11) =5846a(12) =18802a(13) =59356a(14) =185187a(15) =581476a(16) =1855412a(17) =5997965a(18) =19491730a(19) =63395718a(20) =206433172a(21) =674452128a(22) =2213463944a(23) =7293253791a(24) =24098638133a(25) =79791002807a(26) =264698873350a(27) =879945619711