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 A053370 #9 Apr 14 2019 10:52:48 %S A053370 0,1,3,2,2,19,5,27,3,131,17,7,11,943,4,4,447,13,5035,9,37,118,703, %T A053370 15371,79,1595,87,11,28,98,10847,6,6,57731,604,63,1637147,13,478763, %U A053370 20,43331,34,3583111,7,7,21639,36,66436843,8011739,872,15,5699,77 %N A053370 Write fundamental unit for real quadratic field of discriminant n as x + y*omega; sequence gives values of x for n == 1 mod 4. %C A053370 Entries are indexed by values of n from A039955. %D A053370 R. A. Mollin, Quadratics, CRC Press, 1996, Tables B1-B3. %H A053370 S. R. Finch, <a href="http://www.people.fas.harvard.edu/~sfinch/">Class number theory</a> %H A053370 Steven R. Finch, <a href="/A000924/a000924.pdf">Class number theory</a> [Cached copy, with permission of the author] %Y A053370 Cf. A053370-A053375. %K A053370 nonn,easy,nice %O A053370 0,3 %A A053370 _N. J. A. Sloane_, Jan 06 2000