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

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =5a(5) =11a(6) =24a(7) =58a(8) =146a(9) =365a(10) =922a(11) =2383a(12) =6243a(13) =16463a(14) =43748a(15) =117224a(16) =316157a(17) =857088a(18) =2334700a(19) =6388017a(20) =17546354a(21) =48361208a(22) =133710567a(23) =370744754a(24) =1030649811a(25) =2871950293a(26) =8020308614a(27) =22443012438a(28) =62919001546a(29) =176699520967