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 A357499 #7 Oct 02 2022 08:34:07 %S A357499 0,0,1,0,1,2,0,1,4,3,0,1,6,7,4,0,1,12,13,12,11,0,1,26,25,24,25,24 %N A357499 Triangle read by rows: T(n,k) is the length of the longest induced path in the n-dimensional hypercube, such that the end points of the path are at Hamming distance k, 0 <= k <= n. %H A357499 Wikipedia, <a href="https://en.wikipedia.org/wiki/Snake-in-the-box">Snake-in-the-box</a>. %e A357499 Triangle begins: %e A357499 n\k| 0 1 2 3 4 5 6 %e A357499 ---+-------------------- %e A357499 0 | 0 %e A357499 1 | 0 1 %e A357499 2 | 0 1 2 %e A357499 3 | 0 1 4 3 %e A357499 4 | 0 1 6 7 4 %e A357499 5 | 0 1 12 13 12 11 %e A357499 6 | 0 1 26 25 24 25 24 %Y A357499 Cf. A099155 (row maxima), A357360 (main diagonal). %K A357499 nonn,tabl,more,hard %O A357499 0,6 %A A357499 _Pontus von Brömssen_, Oct 01 2022