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 A005241 M3350 #16 Jul 08 2025 16:27:49 %S A005241 1,4,9,11,14,16,21,25,30,36,41,44,49,52,54,64,69,71,81,84,86,92,100, %T A005241 105,120,121,126,136,141,144,149,164,169,174,189,196,201,208,216,225, %U A005241 230,245,252 %N A005241 N-positions in Epstein's Put or Take a Square game. %D A005241 R. K. Guy, Unsolved Problems in Number Theory, E26. %D A005241 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A005241 R. K. Guy, <a href="/A005240/a005240.pdf">Letter to N. J. A. Sloane, Aug 1975</a> %Y A005241 Cf. A005240. %K A005241 nonn %O A005241 1,2 %A A005241 _N. J. A. Sloane_