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 A365140 #4 Aug 27 2023 10:10:36 %S A365140 1,3,7,35,15,39,71,75,99,102,32803,31,47,79,91,103,107,167,230,333, %T A365140 355,358,391,454,2567,32807,32867,32870,65575,65579,65733,65734,65764, %U A365140 65862,65866,196678,34359771171,63,95,111,123,175,231,335,343,349,359,366,371 %N A365140 List of free 4-dimensional polyhypercubes in binary code (see A365139), ordered first by the number of cells, then by the value of the binary code. %C A365140 Can be read as an irregular triangle, whose n-th row contains A068870(n) terms. %H A365140 <a href="/index/Pol#polyominoes">Index entries for sequences related to polyominoes</a>. %e A365140 As an irregular triangle: %e A365140 1; %e A365140 3; %e A365140 7, 35; %e A365140 15, 39, 71, 75, 99, 102, 32803; %e A365140 ... %Y A365140 Cf. A068870, A246521 (2 dimensions), A365139 (3 dimensions), A365141 (5 dimensions). %K A365140 nonn,tabf %O A365140 1,2 %A A365140 _Pontus von Brömssen_, Aug 23 2023