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 A225061 #12 May 29 2013 00:20:59 %S A225061 1,2,3,4,5,7,8,10,11,13,14,15,19,21,25,26,30,31,32,33,36,41,45,49,51, %T A225061 52,56,60,63,64,68,73,76,81,82,83,84,85,88,91,92,93,97,99,109,114,117, %U A225061 120,121,126,134,135,138,139,153,156,161,165,174,178,181,185,195,202,205 %N A225061 Record class numbers of discriminants of imaginary quadratic fields: h(-A225060(n)). %D A225061 H. Heilbronn, On the class number in imaginary quadratic fields, Quart. J. Math. Oxford 5 (1934), pp. 293-301. %H A225061 Charles R Greathouse IV, <a href="/A225061/b225061.txt">Table of n, a(n) for n = 1..675</a> %o A225061 (PARI) r=0;forstep(n=3,1e6,[1,3],t=qfbclassno(-n);if(t>r,print1(r=t", "))) %Y A225061 Cf. A014600, A225060, A038552. %K A225061 nonn %O A225061 1,2 %A A225061 _Charles R Greathouse IV_, Apr 26 2013