a(0) = 1; a(n) = Sum_{k=1..n} -lambda(k+1)*a(n-k), where lambda() is the Liouville function (A008836).

A307240

a(0) = 1; a(n) = Sum_{k=1..n} -lambda(k+1)*a(n-k), where lambda() is the Liouville function (A008836).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =2a(4) =4a(5) =4a(6) =8a(7) =10a(8) =18a(9) =22a(10) =38a(11) =50a(12) =84a(13) =114a(14) =186a(15) =256a(16) =406a(17) =570a(18) =896a(19) =1280a(20) =1986a(21) =2862a(22) =4394a(23) =6380a(24) =9730a(25) =14224a(26) =21582a(27) =31690a(28) =47872a(29) =70544

External references