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 A260814 #42 Aug 04 2015 13:12:37
%S A260814 1,2,4,8,16,32,64,128,256,512,1024,2048,4096,8192,16384,32768,1048576,
%T A260814 536870912
%N A260814 Powers of 2 with distinct digits.
%F A260814 a(n) = 2^A084688(n).
%t A260814 Select[2^Range[0,34], Max@ DigitCount@ # == 1 &] (* _Michael De Vlieger_, Aug 03 2015 *)
%o A260814 (PARI) lista() = {lim = ceil(log(10^11)/(log(2))); for (n=0, lim, d = digits(2^n); if (#vecsort(d,,8) == #d, print1(n, ", ")););} \\ _Michel Marcus_, Aug 03 2015
%Y A260814 Cf. A000079, A029743, A084688.
%K A260814 nonn,base,fini,full
%O A260814 1,2
%A A260814 _Zak Seidov_, Aug 02 2015