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A179854 Number of 0's (mod 3) in the binary expansion of n. 0
0, 1, 0, 2, 1, 1, 0, 0, 2, 2, 1, 2, 1, 1, 0, 1, 0, 0, 2, 0, 2, 2, 1, 0, 2, 2, 1, 2, 1, 1, 0, 2, 1, 1, 0, 1, 0, 0, 2, 1, 0, 0, 2, 0, 2, 2, 1, 1, 0, 0, 2, 0, 2, 2, 1, 0, 2, 2, 1, 2, 1, 1, 0, 0, 2, 2, 1, 2, 1, 1, 0, 2, 1, 1, 0, 1, 0, 0, 2, 2, 1, 1, 0, 1, 0, 0, 2, 1, 0, 0, 2, 0, 2, 2, 1, 2, 1, 1, 0, 1, 0, 0, 2, 1, 0, 0, 2, 0, 2, 2, 1, 1, 0, 0, 2, 0, 2, 2, 1, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

A ternary analog of A059448.

Offset is 1 to avoid the ambiguity at n=0.

Inspired by Chapter 1 of Allouche and Shallit.

REFERENCES

J.-P. Allouche and J. Shallit, Automatic Sequences, Cambridge Univ. Press, 2003.

LINKS

Table of n, a(n) for n=1..120.

MAPLE

s1:=[];

for n from 0 to 200 do

t1:=convert(n, base, 2); t2:=subs(1=NULL, t1); s1:=[op(s1), nops(t2) mod 3]; od:

s1;

CROSSREFS

Cf. A059448.

Sequence in context: A157044 A182748 A025879 * A250622 A212551 A125753

Adjacent sequences:  A179851 A179852 A179853 * A179855 A179856 A179857

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jan 11 2011

STATUS

approved

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Last modified July 16 12:19 EDT 2019. Contains 325079 sequences. (Running on oeis4.)