Denominators of continued fraction convergents to sqrt(409).

Terms

a(0) =1a(1) =4a(2) =9a(3) =67a(4) =76a(5) =143a(6) =219a(7) =1019a(8) =2257a(9) =5533a(10) =74186a(11) =969951a(12) =2014088a(13) =4998127a(14) =22006596a(15) =27004723a(16) =49011319a(17) =76016042a(18) =581123613a(19) =1238263268a(20) =5534176685a(21) =222605330668a(22) =895955499357