Denominators of continued fraction convergents to sqrt(221).

Terms

a(0) =1a(1) =1a(2) =7a(3) =15a(4) =97a(5) =112a(6) =3233a(7) =3345a(8) =23303a(9) =49951a(10) =323009a(11) =372960a(12) =10765889a(13) =11138849a(14) =77598983a(15) =166336815a(16) =1075619873a(17) =1241956688a(18) =35850407137a(19) =37092363825a(20) =258404590087a(21) =553901543999