A167677 - OEIS

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A167677

Replace prime digits by 1 and non-prime digits by 2.

2, 2, 1, 1, 2, 1, 2, 1, 2, 2, 22, 22, 21, 21, 22, 21, 22, 21, 22, 22, 12, 12, 11, 11, 12, 11, 12, 11, 12, 12, 12, 12, 11, 11, 12, 11, 12, 11, 12, 12, 22, 22, 21, 21, 22, 21, 22, 21, 22, 22, 12, 12, 11, 11, 12, 11, 12, 11, 12, 12, 22, 22, 21, 21, 22, 21, 22, 21, 22, 22, 12, 12, 11 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,1`
	LINKS	`Table of n, a(n) for n=0..72.`
	MATHEMATICA	`Table[FromDigits[If[PrimeQ[ # ], 1, 2]&/@IntegerDigits[n]], {n, 0, 200}]`
	CROSSREFS	`Cf. A065031, A167678, A167679.` `Sequence in context: A035222 A136436 A143331 * A074293 A013949 A078880` `Adjacent sequences: A167674 A167675 A167676 * A167678 A167679 A167680`
	KEYWORD	`base,nonn`
	AUTHOR	`Zak Seidov, Nov 09 2009`
	STATUS	`approved`

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Last modified May 25 21:30 EDT 2013. Contains 225649 sequences.