A321101 - OEIS

A321101

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

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

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OFFSET

0,3

LINKS

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

FORMULA

FORMULA FOR TERMS: for n >= 0,

(1) a(3*n) = 0,

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

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

(4) a(9*n+7) = 2,

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

PROG

(PARI) {a(n) =

if(n%3==0, 0,

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

if(n%9==1, 1,

if(n%9==7, 2,

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

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

CROSSREFS

Sequence in context: A226860 A244526 A035394 * A067167 A255195 A194317

Adjacent sequences: A321098 A321099 A321100 * A321102 A321103 A321104

KEYWORD

nonn,cofr

AUTHOR

Paul D. Hanna, Nov 14 2018

STATUS

approved