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A121806 Primes modulo three as two color partition maps { red, blue} of which there are four types:1-> {red, blue},2->{blue,red},3-> {red,red},4->{blue,blue}. 0
2, 2, 2, 4, 3, 2, 4, 2, 1, 3, 4, 1, 1, 1, 1, 2, 2, 3, 4, 2, 2, 2, 3, 2, 4, 1, 4, 2, 1, 1, 1, 1, 3, 2, 4, 3, 1, 2, 2, 2, 2, 1, 2, 2, 4, 1, 1, 4, 3, 1, 4, 3, 4, 2, 3, 2, 1, 1, 4, 3, 4, 1, 1, 3, 1, 3, 2, 2, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4, 1, 4, 3, 1, 2, 2, 1, 1, 3, 1, 1, 4, 3, 1, 1, 1, 4, 3, 4, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
There are long runs of "1"'s.
LINKS
FORMULA
a(n) = {1 + Mod[Prime[2*n-1], 3],1 + Mod[Prime[2*n], 3]/. {2, 3} -> 1 /. {3, 2} -> 2 /. { 2, 2} -> 3 /. {3, 3} -> 4
MATHEMATICA
a = Partition[Table[1 + Mod[Prime[n], 3], {n, 3, 203}], 2] /. {2, 3} -> 1 /. {3, 2} -> 2 /. { 2, 2} -> 3 /. {3, 3} -> 4
CROSSREFS
Sequence in context: A182154 A273875 A054709 * A056944 A283681 A222819
KEYWORD
nonn,uned
AUTHOR
Roger L. Bagula, Aug 29 2006
STATUS
approved

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Last modified April 14 09:38 EDT 2024. Contains 371657 sequences. (Running on oeis4.)