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 A111274 #1 Jan 24 2006 03:00:00 %S A111274 1,2,3,6,9,24 %N A111274 Erroneous enumeration of "congruent and symmetric divisions" of n points on a circle. %D A111274 Motzkin, T. "Relations Between Hypersurface Cross Ratios and a Combinatorial Formula for Partitions of a Polygon for Permanent Preponderance and for Non-Associative Products." Bull. Amer. Math. Soc. 54, page 360, 1948. %H A111274 L. Smiley, <a href="http://www.math.uaa.alaska.edu/~smiley/nc/10NC.pdf">a(5)</a> %Y A111274 See A111275 for the correct enumeration. %K A111274 dead %O A111274 1,2 %E A111274 a(5)=9 is clearly a clerical error.