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 A347911 #129 Dec 05 2021 00:17:20 %S A347911 11111,10001,1011,101,1001,111,11101,10011,10101,11011,1,1111,11,1101, %T A347911 10111,11001 %N A347911 A 4 X 4 pandiagonal magic square read by rows: the entries have digits which are only 0's and 1's and form a magic square in any base b >= 2. %C A347911 The magic square is: %C A347911 [ 11111 10001 1011 101 ] %C A347911 [ 1001 111 11101 10011 ] %C A347911 [ 10101 11011 1 1111 ] %C A347911 [ 11 1101 10111 11001 ] %C A347911 The magic sum of any row, column or diagonal is: %C A347911 1000000 (base 2), %C A347911 100001 (base 3), %C A347911 22230 (base 4), %C A347911 22224 (base 5 and above). %H A347911 <a href="/index/Mag#magic">Index entries for sequences related to magic squares</a> %Y A347911 Cf. A099821, A348269. %K A347911 nonn,fini,full %O A347911 1,1 %A A347911 _Chittaranjan Pardeshi_, Oct 07 2021