id:A113217 - OEIS Search Results

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Parity of decimal digital root of n.

+0
3

0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1 (list; graph; listen)

	OFFSET	`0,1`
	COMMENT	`a(n) = A010888(n) mod 2.`
	FORMULA	`a(n) = if n mod 9 = 1 then 1 else 1 - a(n-1), a(0)=0.`
	CROSSREFS	`Cf. A113218.` `Sequence in context: A071029 A071030 A073445 this_sequence A082446 A130853 A115516` `Adjacent sequences: A113214 A113215 A113216 this_sequence A113218 A113219 A113220`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Oct 18 2005`

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Last modified July 26 23:19 EDT 2008. Contains 142293 sequences.

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