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 A139682 #8 May 08 2020 18:24:44 %S A139682 1,2,8,64,1024,32768,2097152,254409765,52635426489,16734894319214, %T A139682 7584366191600668,4658699927786935270,3743721825782942609558, %U A139682 3832881704712490758507152,4895883231714885655148797216,7669344273849107780888127116263,14522102432152504473007144076157867 %N A139682 Number of n X n symmetric binary matrices with no row sum greater than 6. %H A139682 Andrew Howroyd, <a href="/A139682/b139682.txt">Table of n, a(n) for n = 0..25</a> %Y A139682 Column k=6 of A334548. %K A139682 nonn %O A139682 0,2 %A A139682 _R. H. Hardin_, Jun 13 2008