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 A046875 #7 Mar 19 2018 06:22:50 %S A046875 1,3,3,6,12,24,12,24,24,24,24,48,48,96,96,96,192,192,384,384,384,768, %T A046875 768,768,768,768,768,768,768,768,768,768,768,768,768,768,768,768,768, %U A046875 768,768,768,768,768,1536,1536,1536,1536,1536,1536,1536,1536,1536,1536 %N A046875 Row/column periods of Sprague-Grundy values of Wythoff's Game. %H A046875 A. Dress, A. Flammenkamp and N. Pink, <a href="http://dx.doi.org/10.1006/aama.1998.0632">Additive periodicity of the Sprague-Grundy function of certain Nim games</a>, Adv. Appl. Math., 22, p. 249-270 (1999). %Y A046875 Cf. A046874, A046876. %K A046875 nonn %O A046875 0,2 %A A046875 _Achim Flammenkamp_