Numerators of continued fraction convergents to sqrt(21).

Terms

a(0) =4a(1) =5a(2) =9a(3) =23a(4) =32a(5) =55a(6) =472a(7) =527a(8) =999a(9) =2525a(10) =3524a(11) =6049a(12) =51916a(13) =57965a(14) =109881a(15) =277727a(16) =387608a(17) =665335a(18) =5710288a(19) =6375623a(20) =12085911a(21) =30547445a(22) =42633356a(23) =73180801a(24) =628079764a(25) =701260565a(26) =1329340329a(27) =3359941223