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 A033318 #13 Feb 16 2025 08:32:36 %S A033318 3,2,7,5,23,10,47,17,79,26,119,21,167,50,176,65,287,82,359,57,88,122, %T A033318 527,28,623,170,727,111,839,44,959,257,216,290,1035,183,1367,362,19, %U A033318 77,1679,22,1847,273,208,530,2207,456,2399,626,128,381,2807,730,696 %N A033318 Least D in the Pellian x^2 - D*y^2 = 1 for which y has least solution n. %H A033318 Ray Chandler, <a href="/A033318/b033318.txt">Table of n, a(n) for n = 1..1008</a> %H A033318 N. J. A. Sloane et al., <a href="https://oeis.org/wiki/Binary_Quadratic_Forms_and_OEIS">Binary Quadratic Forms and OEIS</a> (Index to related sequences, programs, references) %H A033318 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PellEquation.html">Pell Equation.</a> %Y A033318 Cf. A000037, A033317. %K A033318 nonn %O A033318 1,1 %A A033318 _Eric W. Weisstein_ %E A033318 Better description from _Lekraj Beedassy_, Feb 26 2002