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 A226321 #16 Jan 28 2021 20:56:22
%S A226321 1,2,8,88,3245,254411,37324414
%N A226321 Number of real {0,1} matrices n X n which are the square of a {0,1} matrix.
%C A226321 A121231(n) >= a(n).
%H A226321 <a href="/index/Mat#binmat">Index entries for matrices, binary, which are squares</a>
%e A226321 The 8 solutions when n=2 are:
%e A226321 00 00 00 01 10 10 10 11
%e A226321 00 01 11 01 00 01 10 00
%e A226321 - from _N. J. A. Sloane_, Jun 03 2013
%Y A226321 Cf. A121231, A225371.
%K A226321 nonn,more,hard
%O A226321 0,2
%A A226321 _Giovanni Resta_, Jun 03 2013