%I #7 Sep 11 2019 05:09:46
%S 1,2,4,9,19,54,145,458,1468,4936,16885,58996,208245,743422,2675088,
%T 9696297,35359267,129648938,477642881,1767274939,6564131656,
%U 24466301616,91482592297,343059720014,1289904222419,4861946731090
%N Dirichlet convolution of Fibonacci numbers with Catalan numbers.
%F a(n) ~ 2^(2*n-2) / (sqrt(Pi) * n^(3/2)). - _Vaclav Kotesovec_, Sep 11 2019
%t Table[Sum[CatalanNumber[n/d - 1]*Fibonacci[d], {d, Divisors[n]}], {n, 1, 25}] (* _Vaclav Kotesovec_, Sep 10 2019 *)
%K nonn
%O 1,2
%A _Erich Friedman_