Denominators of continued fraction convergents to sqrt(209).

Terms

a(0) =1a(1) =2a(2) =11a(3) =35a(4) =81a(5) =278a(6) =1471a(7) =3220a(8) =91631a(9) =186482a(10) =1024041a(11) =3258605a(12) =7541251a(13) =25882358a(14) =136953041a(15) =299788440a(16) =8531029361a(17) =17361847162a(18) =95340265171a(19) =303382642675a(20) =702105550521