Numerators of continued fraction convergents to sqrt(644).

Terms

a(0) =25a(1) =51a(2) =76a(3) =127a(4) =203a(5) =1345a(6) =1548a(7) =2893a(8) =4441a(9) =11775a(10) =593191a(11) =1198157a(12) =1791348a(13) =2989505a(14) =4780853a(15) =31674623a(16) =36455476a(17) =68130099a(18) =104585575a(19) =277301249a(20) =13969648025a(21) =28216597299a(22) =42186245324a(23) =70402842623a(24) =112589087947a(25) =745937370305a(26) =858526458252