

A084688


Nonnegative integers n such that 2^n uses only distinct decimal digits.


2



0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 20, 29
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OFFSET

1,3


COMMENTS

There are exactly 18 numbers such that 2^n uses only distinct digits.
a(n) can have at most 10 digits. As 2^34 has 11 digits, a(n) < 34.  David A. Corneth, Aug 03 2015


LINKS



FORMULA



EXAMPLE



MATHEMATICA



PROG

(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


CROSSREFS



KEYWORD

fini,nonn,full,base


AUTHOR



STATUS

approved



