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 A337309 #17 Aug 08 2023 22:22:10 %S A337309 0,0,0,0,1,2,967,4871991,3292326080087 %N A337309 Number of main classes of bachelor diagonal Latin squares of order n. %C A337309 A bachelor diagonal Latin square is one with no orthogonal mate. %H A337309 Eduard I. Vatutin, <a href="https://vk.com/wall162891802_1295">About the number of main classes of bachelor diagonal Latin squares of orders 1-8</a> (in Russian). %H A337309 Eduard I. Vatutin, Natalia N. Nikitina, Maxim O. Manzuk, <a href="https://vk.com/wall162891802_1485">First results of an experiment on studying the properties of DLS of order 9 in the volunteer distributed computing projects Gerasim@Home and RakeSearch</a> (in Russian). %H A337309 E. I. Vatutin, <a href="http://evatutin.narod.ru/evatutin_dls_spec_types_list.pdf">Special types of diagonal Latin squares</a>, Cloud and distributed computing systems in electronic control conference, within the National supercomputing forum (NSCF - 2022). Pereslavl-Zalessky, 2023. pp. 9-18. (in Russian) %H A337309 <a href="https://oeis.org/index/La#Latin">Index entries for sequences related to Latin squares and rectangles</a>. %F A337309 a(n) = A287764(n) - A330391(n). %Y A337309 Cf. A305568, A305569, A330391, A287764. %K A337309 nonn,more,hard %O A337309 1,6 %A A337309 _Eduard I. Vatutin_, Aug 22 2020 %E A337309 a(9) added by _Eduard I. Vatutin_, Dec 08 2020