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 A246283 #5 Aug 21 2014 11:38:32 %S A246283 3,50,825,14794,294987,6547946,160994565,4355845868,128831993037, %T A246283 4139915120692,143730813561387,5364402750234722,214267821055280535, %U A246283 9122448969654942398,412494871628188325985,19745497885965416922364,997667658771538572210069 %N A246283 Number of endofunctions on [n] with cycles of two distinct lengths. %H A246283 Alois P. Heinz, <a href="/A246283/b246283.txt">Table of n, a(n) for n = 3..200</a> %Y A246283 Column k=2 of A242027. %K A246283 nonn %O A246283 3,1 %A A246283 _Alois P. Heinz_, Aug 21 2014