A035057 Numbers n such that 2^n does not contain the digit 1 (probably finite).

1, 2, 3, 5, 6, 8, 11, 12, 15, 16, 19, 23, 25, 28, 32, 33, 35, 38, 43, 52, 56, 59, 63, 66, 73, 91

Offset

1,2

Comments

No other terms < 10^6. - Chai Wah Wu, Aug 31 2017

Links

Table of n, a(n) for n=1..26.

Mathematica

Select[Range[100], DigitCount[2^#, 10, 1]==0&] (* Harvey P. Dale, Jun 06 2013 *)

Prog

(Magma) [n: n in [0..1000] | not 1 in Intseq(2^n) ]; // Vincenzo Librandi, May 06 2015
(Python)
A035057_list = [n for n in range(1, 10**3) if '1' not in str(2**n)] # Chai Wah Wu, Aug 31 2017

Crossrefs

Cf. similar sequences listed in A035064.

Sequence in context: A268226 A138529 A266409 * A005099 A161720 A105760

Adjacent sequences: A035054 A035055 A035056 * A035058 A035059 A035060

Keyword

nonn,base

Author

Patrick De Geest, Nov 15 1998

Status

approved