A004645 Powers of 2 written in base 6.

1, 2, 4, 12, 24, 52, 144, 332, 1104, 2212, 4424, 13252, 30544, 101532, 203504, 411412, 1223224, 2450452, 5341344, 15123132, 34250304, 112541012, 225522024, 455444052, 1355332144, 3155104332, 10354213104

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• base
• easy

Links

• Vincenzo Librandi, Table of n, a(n) for n = 0..1000

Crossrefs

Cf. A000079, A004642, ..., A004655: powers of 2 written in base 10, 3, 4, ..., 16

Cf. A000244, A004656, A004658, A004659, ... : powers of 3 written in base 10, 2, 4, 5, ...

Programs

Magma

[Seqint(Intseq(2^n, 6)): n in [0..30]]; // G. C. Greubel, Sep 10 2018

Mathematica

Table[FromDigits[IntegerDigits[2^n, 6]], {n, 0, 40}] (* Vincenzo Librandi, Jun 07 2013 *)

PARI

a(n)=fromdigits(digits(2^n,6)) \\ M. F. Hasler, Jun 23 2018