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 A289812 #15 Aug 03 2017 04:29:53 %S A289812 1,2,3,4,5,6,7,8,9,10,11,13,14,15,16,17,18,19,21,22,23,25,26,27,29,31, %T A289812 32 %N A289812 n for which a Factor Pair Latin Square of order n exists. %C A289812 This sequences differs from A206551 because no Factor Pair Latin Square of order 45 exists. %C A289812 It is known that every prime power (A000961) as well as twice every prime number (A100484) appears in this sequence. %H A289812 James Hammer, <a href="https://etd.auburn.edu/handle/10415/4555">Factor Pair Latin Squares</a>, Dissertation, Auburn University, 2015. %Y A289812 Cf. A000961, A100484, A206551. %K A289812 nonn,hard,more %O A289812 1,2 %A A289812 _Jordan Lenchitz_, _Leah S. Miller_, _Makkah Davis_, _Bob Kuo_, _Boyang Su_, _James Hammer_, Jul 12 2017