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 A139679 #7 May 08 2020 22:12:33 %S A139679 1,2,8,64,809,13846,301262,8035168,255780779,9519891214,407613033836, %T A139679 19816627136912,1082142442901863,65776576008442274, %U A139679 4416031241930248774,325289604104049686096,26137255635911145802777,2279186202842678350137218,214713550195887533572753024 %N A139679 Number of n X n symmetric binary matrices with no row sum greater than 3. %H A139679 Andrew Howroyd, <a href="/A139679/b139679.txt">Table of n, a(n) for n = 0..100</a> %Y A139679 Column k=3 of A334548. %K A139679 nonn %O A139679 0,2 %A A139679 _R. H. Hardin_, Jun 13 2008 %E A139679 Terms a(13) and beyond from _Andrew Howroyd_, May 08 2020