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 A068294 #19 Aug 04 2025 10:13:37 %S A068294 1,24,1344,187008,65012352,56638464768,123968096842368, %T A068294 682463815024774272,9455897825697924931968, %U A068294 329835949030491781985964672,28967729014957963606903092579840,6405563550899359667890368716213003520,3566277295414164369700428069692324488565760,4998812913455162820842387241261713638306330756608 %N A068294 1/5 the number of colorings of an n X n octagonal array with 5 colors. %H A068294 Christian Gaetz and Yibo Gao, <a href="https://arxiv.org/abs/2408.07863">Interlacing triangles, Schubert puzzles, and graph colorings</a>, arXiv:2408.07863 [math.CO], 2024. See p. 15. See also <a href="https://www.mat.univie.ac.at/~slc/wpapers/FPSAC2025/26.pdf">Sém. Lothar. Combin.</a>, (2025) Vol. 93B, Art. No. 26. See p. 10. %Y A068294 Cf. A068239-A068305, A000332, A002417, A027441, A212208, A212209. %K A068294 nonn %O A068294 1,2 %A A068294 _R. H. Hardin_, Feb 24 2002 %E A068294 a(8) from _Alois P. Heinz_, May 03 2012 %E A068294 a(9)-a(14) from _Andrew Howroyd_, Jun 25 2017