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 A139683 #8 May 08 2020 18:24:58 %S A139683 1,2,8,64,1024,32768,2097152,268435456,66628946641,29707592691510, %T A139683 21634670753754060,23709506474859569328,36821021837919664452090, %U A139683 77635187673471762914463552,215313862348697780762374273824,766493362781127793638943080523776 %N A139683 Number of n X n symmetric binary matrices with no row sum greater than 7. %H A139683 Andrew Howroyd, <a href="/A139683/b139683.txt">Table of n, a(n) for n = 0..25</a> %Y A139683 Column k=7 of A334548. %K A139683 nonn %O A139683 0,2 %A A139683 _R. H. Hardin_, Jun 13 2008 %E A139683 Terms a(13) and beyond from _Andrew Howroyd_, May 08 2020