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 A046874 #7 Mar 19 2018 06:22:04 %S A046874 0,0,0,8,9,27,37,92,102,127,224,277,347,382,613,693,771,865,919,1032, %T A046874 1165,1252,1293,1373,1732,2208,2314,2608,2889,3221,3890,4422,4419, %U A046874 5614,6065,6837,7116,8041,8356,9208,10333,10799,12518,13849,14190,15844 %N A046874 Row/column pre-periods of Sprague-Grundy values of Wythoff's Game. %H A046874 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 A046874 Cf. A046875, A046876. %K A046874 nonn %O A046874 0,4 %A A046874 _Achim Flammenkamp_