A004658 Powers of 3 written in base 4.

1, 3, 21, 123, 1101, 3303, 23121, 202023, 1212201, 10303203, 32122221, 223033323, 2001233301, 12011033103, 102033231321, 312233021223, 2210031131001, 13230220113003, 113011321011021, 1011101223033123

Offset

0,2

Links

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

Mathematica

Table[FromDigits[IntegerDigits[3^n, 4]], {n, 0, 40}] (* Vincenzo Librandi, Jun 07 2013 *)

Prog

(PARI) a(n, b=4, m=3)=fromdigits(digits(m^n, b)) \\ M. F. Hasler, Jun 22 2018
(Magma) [Seqint(Intseq(3^n, 4)): n in [0..30]]; // G. C. Greubel, Sep 10 2018

Crossrefs

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

Cf. A000079, A004643, ..., A004655: powers of 2 written in base 10, 4, 5, ..., 16

Sequence in context: A322185 A171137 A144884 * A034552 A356889 A220616

Adjacent sequences: A004655 A004656 A004657 * A004659 A004660 A004661

Keyword

nonn,base,easy

Author

N. J. A. Sloane

Status

approved