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 A046876 #11 May 04 2021 18:10:08 %S A046876 1,2,1,1,1,1,4,2,3,2,3,23,24,3,20,18,84,25,43 %N A046876 Length of runs in the sequence of row/column periods of Sprague-Grundy values of Wythoff's Game (A046875). %C A046876 a(20) >= 12. - _Sean A. Irvine_, May 02 2021 %H A046876 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 A046876 Cf. A046874, A046875, A004481. %K A046876 nonn,more %O A046876 1,2 %A A046876 _Achim Flammenkamp_ %E A046876 Entry revised by _Sean A. Irvine_, May 02 2021