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A004656 Powers of 3 written in base 2. 18
1, 11, 1001, 11011, 1010001, 11110011, 1011011001, 100010001011, 1100110100001, 100110011100011, 1110011010101001, 101011001111111011, 10000001101111110001, 110000101001111010011, 10010001111101101111001 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

REFERENCES

S. Wolfram, A New Kind of Science, Wolfram Media, 2002, pp. 120 and 903.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..640

MATHEMATICA

Table[ FromDigits[ IntegerDigits[3^n, 2]], {n, 0, 14}]

PROG

(PARI) a(n)=fromdigits(binary(3^n)) \\ M. F. Hasler, Jun 23 2018

(MAGMA) [Seqint(Intseq(3^n, 2)): n in [0..30]]; // G. C. Greubel, Sep 10 2018

CROSSREFS

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

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

Sequence in context: A278753 A266670 A272654 * A143016 A152577 A278757

Adjacent sequences:  A004653 A004654 A004655 * A004657 A004658 A004659

KEYWORD

nonn,base,easy

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified April 9 06:32 EDT 2020. Contains 333343 sequences. (Running on oeis4.)