零幂, OEIS wiki, Mar 07 2014
%F A238938 a(n) = 2^A007377(n).
%e A238938 256 = 2^8 is in the sequence because 256 has a 2, a 5 and a 6 but no 0s.
%e A238938 512 = 2^9 is also in because it has a 1, a 2 and a 5 but no 0s.
%e A238938 1024 = 2^10 is not in the sequence because it has a 0.
%t A238938 Select[2^Range[0, 127], DigitCount[#, 10, 0] == 0 &] (* _Alonso del Arte_, Mar 07 2014 *)
%o A238938 (PARI) for(n=0,99,vecmin(digits(2^n))&& print1(2^n","))
%Y A238938 Cf. A007377, A030700, A030701, A008839, A030702, A030703, A030704, A030705, A030706, A195944.
%Y A238938 Cf. A195908, A195946, A195945.
%Y A238938 Cf. A195942, A195943, A027870, A102483.
%K A238938 nonn,base
%O A238938 1,2
%A A238938 _M. F. Hasler_, Mar 07 2014
%E A238938 'fini' keyword removed as finiteness is only conjectured by _Max Alekseyev_, Apr 10 2019
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