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 A360223 #17 Feb 25 2024 06:08:32 %S A360223 0,0,0,12,0,0,18,112,72 %N A360223 Maximum number of intercalates in an orthogonal diagonal Latin square of order n. %C A360223 An intercalate is a 2 X 2 subsquare of a Latin square. %C A360223 An orthogonal diagonal Latin square is a diagonal Latin square that has at least one orthogonal diagonal mate. %C A360223 a(10) >= 76, a(11) >= 94, a(12) >= 324, a(13) >= 26. - _Eduard I. Vatutin_, updated Feb 25 2024 %H A360223 Eduard I. Vatutin, <a href="https://vk.com/wall162891802_1709">About the spectra of numerical characteristics of orthogonal diagonal Latin squares of orders 1-11</a> (in Russian). %H A360223 Eduard I. Vatutin, <a href="/A360223/a360223_1.txt">Proving list (best known examples)</a>. %H A360223 E. I. Vatutin, N. N. Nikitina, M. O. Manzuk, A. M. Albertyan, and I. I. Kurochkin, <a href="http://evatutin.narod.ru/evatutin_spectra_t_dt_i_o_small_orders_thesis.pdf">On the construction of spectra of fast-computable numerical characteristics for diagonal Latin squares of small order</a>, Intellectual and Information Systems (Intellect - 2021), Tula, 2021, pp. 7-17. (in Russian) %H A360223 <a href="/index/La#Latin">Index entries for sequences related to Latin squares and rectangles</a>. %Y A360223 Cf. A305570, A305571, A307164, A354050, A360221. %K A360223 nonn,more,hard %O A360223 1,4 %A A360223 _Eduard I. Vatutin_, Jan 30 2023