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 A241987 #13 Oct 06 2014 23:02:33 %S A241987 1,5,9,13,13,23,29,29,29,39,39,47,61,57,51,63,73,79,81,79,83,93,87,87, %T A241987 105,97,95,123,121,137,129,111,125,145,131,159,153,171,161,173 %N A241987 The number of P-positions in the Consecutive game with at most three piles, allowing for piles of zero, that are born in generation n. %C A241987 In the Consecutive game, there are several piles of counters. A player is allowed to take the same positive number of counters from any subset of consecutive piles or any positive number of counters from one pile. The player who cannot move loses. %C A241987 a(n) is always odd. %H A241987 T. Khovanova and J. Xiong, <a href="http://arxiv.org/abs/1407.1533">Cookie Monster Plays Games</a>, arXiv:1407.1533 [math.HO], 2014. %e A241987 For n = 1 the a(1) = 5 P-positions are (1,0,1), (0,1,2), (0,2,1), (1,2,0), and (2,1,0). %Y A241987 Cf. A241988 (first differences), A237711 (Nim), A241983 (Cookie Monster Game), A241985 (At-Most-2-Jars Game). %K A241987 nonn %O A241987 0,2 %A A241987 _Tanya Khovanova_ and _Joshua Xiong_, Aug 10 2014