A004646 Powers of 2 written in base 7.

1, 2, 4, 11, 22, 44, 121, 242, 514, 1331, 2662, 5654, 14641, 32612, 65524, 164351, 362032, 1054064, 2141161, 4312352, 11625034, 23553101, 50436202, 131205404, 262414111, 555131222, 1443262444, 3216555221, 6436443442, 16206220214, 35415440431, 104134211162

Offset

0,2

Links

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

Mathematica

Table[FromDigits[IntegerDigits[2^n, 7]], {n, 0, 40}] (* Vladimir Joseph Stephan Orlovsky, Feb 17 2012 *)

Prog

(PARI) for(n=0, 30, print1(fromdigits(digits(2^n, 7)), ", ")) \\ G. C. Greubel, Sep 10 2018
(Magma) [Seqint(Intseq(2^n, 7)): n in [0..30]]; // G. C. Greubel, Sep 10 2018

Crossrefs

Sequence in context: A290439 A018259 A018480 * A072205 A026531 A302916

Adjacent sequences: A004643 A004644 A004645 * A004647 A004648 A004649

Keyword

nonn,base,easy

Author

N. J. A. Sloane

Status

approved