A321102 - OEIS

A321102

Sequence generated by: a(3*n) = 1, a(3*n+2) = 1 - a(3*n+1), a(9*n+1) = 1, a(9*n+7) = 0, a(9*n+4) = 1 - a(3*n+1), for n >= 0.

2, 1, 0, 2, 0, 1, 2, 0, 1, 2, 1, 0, 2, 1, 0, 2, 0, 1, 2, 1, 0, 2, 1, 0, 2, 0, 1, 2, 1, 0, 2, 0, 1, 2, 0, 1, 2, 1, 0, 2, 0, 1, 2, 0, 1, 2, 1, 0, 2, 1, 0, 2, 0, 1, 2, 1, 0, 2, 0, 1, 2, 0, 1, 2, 1, 0, 2, 0, 1, 2, 0, 1, 2, 1, 0, 2, 1, 0, 2, 0, 1, 2, 1, 0, 2, 0, 1, 2, 0, 1, 2, 1, 0, 2, 1, 0, 2, 0, 1, 2, 1, 0, 2, 1, 0, 2, 0, 1, 2, 1, 0, 2, 0, 1, 2, 0, 1, 2, 1, 0, 2, 1, 0, 2, 0, 1, 2, 1, 0, 2, 1, 0, 2, 0, 1, 2, 1, 0, 2, 0, 1, 2, 0, 1, 2, 1, 0, 2, 0, 1, 2, 0, 1, 2, 1, 0, 2, 1, 0, 2, 0, 1, 2, 1, 0, 2, 0, 1, 2, 0, 1, 2, 1, 0, 2, 1, 0, 2, 0, 1, 2, 1, 0, 2, 1, 0, 2, 0, 1, 2, 1, 0, 2, 0, 1, 2, 0, 1, 2, 1, 0

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OFFSET

0,1

LINKS

Table of n, a(n) for n=0..200.

FORMULA

FORMULA FOR TERMS: for n >= 0,

(1) a(3*n) = 2,

(2) a(3*n+2) = 1 - a(3*n+1),

(3) a(9*n+1) = 1,

(4) a(9*n+7) = 0,

(5) a(9*n+4) = 1 - a(3*n+1).

PROG

(PARI) /* Using formula for terms */

{a(n) =

if(n%3==0, 2,

if(n%3==2, 1 - a(n-1),

if(n%9==1, 1,

if(n%9==7, 0,

if(n%9==4, 1 - a((n-1)/3) )))))}

for(n=0, 200, print1(a(n), ", "))

CROSSREFS

Sequence in context: A354452 A362450 A298731 * A368199 A091392 A036577

Adjacent sequences: A321099 A321100 A321101 * A321103 A321104 A321105

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Nov 25 2018

STATUS

approved