Numerators of continued fraction convergents to sqrt(641).

Terms

a(0) =25a(1) =76a(2) =481a(3) =557a(4) =5494a(5) =17039a(6) =22533a(7) =84638a(8) =107171a(9) =620493a(10) =727664a(11) =1348157a(12) =7468449a(13) =8816606a(14) =33918267a(15) =42734873a(16) =162122886a(17) =1501840847a(18) =1663963733a(19) =11485623245a(20) =36120833468