This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A065009 #6 Jul 08 2024 11:35:56
%S A065009 10,38,84,103,148,173,230,261,294,330,367,406,448,491,536,583,584,633,
%T A065009 684,737,738,793,850,909,910,970,971,1034,1099,1100,1166,1167,1236,
%U A065009 1307,1308,1380,1381,1455,1456,1533,1534,1612,1613,1693,1694,1777,1778
%N A065009 Integers for which the periodic part of the continued fraction for the square root of n begins with 6.
%e A065009 The continued fraction for the square root of 84 is 9, {6, 18}.
%t A065009 Select[ Range[1500], First[ Last[ ContinuedFraction[ Sqrt[ # ]]]] == 6 & ]
%Y A065009 Cf. A065005.
%K A065009 easy,nonn
%O A065009 1,1
%A A065009 _Robert G. Wilson v_, Nov 01 2001