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 A287014 #10 Sep 08 2022 08:46:19
%S A287014 1,1,10,101,1111,110100,11001011,1101101101,1000000101100,
%T A287014 101001010011011,11100010100000111,10100101101010101010,
%U A287014 10000000100101101011101,1101001011101001000010101,1011011000001110010001111010,1010010011011100100010111010001
%N A287014 Bell numbers written in base 2.
%H A287014 Robert Israel, <a href="/A287014/b287014.txt">Table of n, a(n) for n = 0..214</a>
%F A287014 a(n) = A007088(A000110(n)).
%p A287014 seq(convert(combinat:-bell(n),binary),n=0..20); # _Robert Israel_, Aug 12 2018
%t A287014 Table[FromDigits[IntegerDigits[BellB[n], 2]], {n, 0, 30}]
%o A287014 (Magma) [Seqint(Intseq(Bell(n), 2)): n in [0..20]];
%Y A287014 Cf. A000110, A004685, A007088,
%K A287014 nonn,base
%O A287014 0,3
%A A287014 _Vincenzo Librandi_, May 22 2017