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 A233748 #40 Feb 05 2024 10:48:38 %S A233748 1,3,22,513,67685,37205801,74992370359,543437207831908, %T A233748 14224090440652751128,1355263603548588163939892, %U A233748 473629305416562052216063601182,611217587951920565260750675133929534,2929826971690847578421964010597063713803102,52431093582529289457516130655642218612938867242516 %N A233748 Number of colorings of the edges of the complete graph on n unlabeled vertices using at most four colors up to permutation of the colors. %D A233748 Harary and Palmer, Graphical Enumeration, Chapter Six. %H A233748 Marko Riedel, <a href="/A233748/b233748.txt">Table of n, a(n) for n = 2..40</a> %H A233748 Marko Riedel, <a href="http://math.stackexchange.com/questions/607956/">Colorings of the cube</a>. %H A233748 Marko Riedel, <a href="/A233748/a233748_1.maple.txt">Colorings of the complete graph Kn with some number of swappable colors</a>. %Y A233748 Cf. A007869. %K A233748 nonn %O A233748 2,2 %A A233748 _Marko Riedel_, Dec 20 2013 %E A233748 Definition clarified by _Andrew Howroyd_, Feb 04 2024