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 A204093 #22 Oct 30 2023 13:01:13
%S A204093 0,6,60,66,600,606,660,666,6000,6006,6060,6066,6600,6606,6660,6666,
%T A204093 60000,60006,60060,60066,60600,60606,60660,60666,66000,66006,66060,
%U A204093 66066,66600,66606,66660,66666,600000,600006,600060,600066,600600,600606,600660,600666
%N A204093 Numbers whose set of base-10 digits is {0,6}.
%H A204093 Reinhard Zumkeller, <a href="/A204093/b204093.txt">Table of n, a(n) for n = 0..10000</a>
%F A204093 a(n) = 6 * A007088(n).
%t A204093 Map[FromDigits,Tuples[{0,6},6]] (* _Paolo Xausa_, Oct 30 2023 *)
%o A204093 (Haskell)
%o A204093 a204093 n = a204093_list !! n
%o A204093 a204093_list = map (* 6) a007088_list
%o A204093 (Python)
%o A204093 def a(n): return int(bin(n)[2:].replace('1', '6'))
%o A204093 print([a(n) for n in range(40)]) # _Michael S. Branicky_, Jun 06 2021
%Y A204093 Cf. A007088, A078245.
%Y A204093 Cf. A169965, A169966, A169967, A169964, A204094, A204095, A097256.
%K A204093 nonn,base
%O A204093 0,2
%A A204093 _Reinhard Zumkeller_, Jan 10 2012