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 A076437 #15 Feb 16 2025 08:32:47 %S A076437 1,2,3,5,6,7,8,10,12,13,15,17,18,20,21,22,25,26,27,28,31,36,37,38,40, %T A076437 41,42,43,45,46,48,51,52,53,55,56,57,58,60,63,66,68,70,72,73,75,76,77, %U A076437 78,80 %N A076437 Square board sizes for which the lights out problem has a unique solution (counting solutions differing only by rotation and reflection as equivalent). %H A076437 M. Anderson and T. Feil, <a href="http://www.jstor.org/stable/2690705">Turning Lights Out with Linear Algebra</a>, Mathematics Magazine, 71 (1998), 300-303 %H A076437 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/LightsOutPuzzle.html">Lights Out Puzzle</a> %Y A076437 Cf. A075463, A076436. %K A076437 nonn,more %O A076437 1,2 %A A076437 _Eric W. Weisstein_, Oct 11 2002 %E A076437 More terms from _Zhao Hui Du_, Mar 29 2014