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 A381971 #6 Mar 18 2025 18:00:39 %S A381971 0,4,6,120,890 %N A381971 Maximum number of diagonal transversals in a Brown's diagonal Latin square of order 2n. %C A381971 A Brown's diagonal Latin square is a horizontally symmetric row-inverse or vertically symmetric column-inverse diagonal Latin square (see A339641). %C A381971 Brown's diagonal Latin squares are special case of plain symmetry diagonal Latin squares that are not exist for odd orders. %C A381971 a(6)>=28496, a(7)>=490218, a(8)>=32172800. %H A381971 Eduard I. Vatutin, <a href="https://vk.com/wall162891802_2895">About the spectra of numerical characteristics of Brown's diagonal Latin squares</a> (in Russian). %H A381971 Eduard I. Vatutin, <a href="/A381971/a381971.txt">Proving list (best known examples)</a>. %H A381971 <a href="/index/La#Latin">Index entries for sequences related to Latin squares and rectangles</a>. %Y A381971 Cf. A287648, A339641. %K A381971 nonn,more,hard %O A381971 1,2 %A A381971 _Eduard I. Vatutin_, Mar 11 2025