Denominators of continued fraction convergents to sqrt(5).

Terms

a(0) =0a(1) =1a(2) =4a(3) =17a(4) =72a(5) =305a(6) =1292a(7) =5473a(8) =23184a(9) =98209a(10) =416020a(11) =1762289a(12) =7465176a(13) =31622993a(14) =133957148a(15) =567451585a(16) =2403763488a(17) =10182505537a(18) =43133785636a(19) =182717648081a(20) =774004377960