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 A171948 #21 Jan 06 2021 12:42:19 %S A171948 0,1,2,3,5,6,7,9,10,11,13,14,15,16,17,18,19,21,22,23,25,26,27,29,30, %T A171948 31,32,33,34,35,37,38,39,41,42,43,45,46,47,48,49,50,51,53,54,55,57,58, %U A171948 59,61,62,63,65,66,67,69,70,71,73,74,75,77,78,79,80,81,82,83,85,86,87,89,90,91,93,94,95,96,97,98,99,101,102,103,105,106 %N A171948 N-positions for game of Mark-4. %H A171948 Aviezri S. Fraenkel, <a href="http://dx.doi.org/10.1016/j.disc.2011.03.032">The vile, dopey, evil and odious game players</a>, Discrete Math. 312 (1) (2012) 42-46. %H A171948 David Wakeham and David R. Wood, <a href="http://www.emis.de/journals/INTEGERS/papers/n26/n26.Abstract.html">On multiplicative Sidon sets</a>, INTEGERS, 13 (2013), #A26. %p A171948 # see A171949 %Y A171948 Complement of A171949. %K A171948 nonn,easy %O A171948 1,3 %A A171948 _N. J. A. Sloane_, Oct 29 2010