Numerators of continued fraction convergents to sqrt(643).

Terms

a(0) =25a(1) =51a(2) =76a(3) =279a(4) =355a(5) =5959a(6) =48027a(7) =102013a(8) =150040a(9) =252053a(10) =1410305a(11) =35509678a(12) =178958695a(13) =214468373a(14) =393427068a(15) =1001322509a(16) =8404007140a(17) =135465436749a(18) =143869443889a(19) =567073768416a(20) =710943212305