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 A053304 #11 Nov 16 2018 13:52:30
%S A053304 1,1,3,6,16,34,90,211,515,1229,2960,6893,15753,34450,72235,143477,
%T A053304 269186,473945,781713,1203617,1728192,2310376,2874232,3325215,3576980,
%U A053304 3576980,3325215,2874232,2310376,1728192,1203617,781713,473945,269186
%N A053304 Number of 7 X 7 binary matrices with n=0..49 ones up to row and column permutations.
%H A053304 Andrew Howroyd, <a href="/A053304/b053304.txt">Table of n, a(n) for n = 0..49</a>
%F A053304 a(n) = A049311(n) for n <= 7.
%F A053304 Sum_{n=0..49} a(n) = 33642660 = A002724(7).
%o A053304 (PARI) \\ See A321609 for M.
%o A053304 vector(50, n, M(7,7,n-1))
%Y A053304 Row 7 of A052371 and A321609.
%Y A053304 Cf. A002724, A049311.
%K A053304 fini,full,nonn
%O A053304 0,3
%A A053304 _Vladeta Jovovic_, Mar 05 2000