Numerators of continued fraction convergents to sqrt(639).

Terms

a(0) =25a(1) =76a(2) =101a(3) =177a(4) =455a(5) =1997a(6) =8443a(7) =10440a(8) =50203a(9) =60643a(10) =292775a(11) =1231743a(12) =2756261a(13) =3988004a(14) =6744265a(15) =24220799a(16) =1217784215a(17) =3677573444a(18) =4895357659a(19) =8572931103a(20) =22041219865a(21) =96737810563a(22) =408992462117