a(0)=a(1)=0; for n>1, a(n) = numerator( r(n) ), where r(n) = r(n-1)+r(n-2)+A027641(n-2)/A027642(n-2) and r(0)=r(1)=a(0).

A227500

a(0)=a(1)=0; for n>1, a(n) = numerator( r(n) ), where r(n) = r(n-1)+r(n-2)+A027641(n-2)/A027642(n-2) and r(0)=r(1)=a(0).

Terms

    a(0) =0a(1) =0a(2) =1a(3) =1a(4) =5a(5) =13a(6) =19a(7) =179a(8) =1028a(9) =1103a(10) =893a(11) =2889a(12) =15445a(13) =249787a(14) =24988a(15) =8494711a(16) =6888613a(17) =7423979a(18) =101535859a(19) =329279361a(20) =1187585188a(21) =128951009a(22) =2513033741a(23) =25007430139a(24) =599126628077a(25) =591141383117a(26) =-3361274604

External references