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 A053372 #12 Apr 14 2019 11:00:43 %S A053372 2,8,10,4,170,24,1520,6,25,3482,48,50,89,530,48842,3480,80,82,28,1574, %T A053372 39,227528,962,295,1126,120,122,4730624,10610,77563250,12,1728148040, %U A053372 249,1324,64080026,168,4190210,487,1682,8994000,14 %N A053372 Write fundamental unit for real quadratic field of discriminant n as x + y*omega; sequence gives values of x for n == 3 mod 4. %C A053372 Entries are indexed by values of n from A039957. %D A053372 R. A. Mollin, Quadratics, CRC Press, 1996, Tables B1-B3. %H A053372 S. R. Finch, <a href="http://www.people.fas.harvard.edu/~sfinch/">Class number theory</a> %H A053372 Steven R. Finch, <a href="/A000924/a000924.pdf">Class number theory</a> [Cached copy, with permission of the author] %t A053372 NumberFieldFundamentalUnits[ Sqrt[#] ][[1, 2, 1]] & /@ Select[Range[3, 195, 4], SquareFreeQ ] (* _Jean-François Alcover_, Jul 09 2013 *) %Y A053372 Cf. A053370-A053375. %K A053372 nonn,easy,nice %O A053372 0,1 %A A053372 _N. J. A. Sloane_, Jan 06 2000