id:A100830 - OEIS Search Results

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Smallest number with same digital root as n but distinct from n and all earlier occurrences.

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1

10, 11, 12, 13, 14, 15, 16, 17, 18, 1, 2, 3, 4, 5, 6, 7, 8, 9, 28, 29, 30, 31, 32, 33, 34, 35, 36, 19, 20, 21, 22, 23, 24, 25, 26, 27, 46, 47, 48, 49, 50, 51, 52, 53, 54, 37, 38, 39, 40, 41, 42, 43, 44, 45, 64, 65, 66, 67, 68, 69, 70, 71, 72, 55, 56, 57, 58, 59, 60, 61, 62, 63 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`A010888(a(n)) = A010888(n) and a(n)<>n;` `a(a(n))=n: self-inverse permutation of the natural numbers.`
	LINKS	`Index entries for sequences that are permutations of the natural numbers`
	FORMULA	`a(n) = n + 9*(-1)^floor((n-1)/9).`
	CROSSREFS	`Sequence in context: A162501 A123895 A147519 this_sequence A168100 A088475 A001637` `Adjacent sequences: A100827 A100828 A100829 this_sequence A100831 A100832 A100833`
	KEYWORD	`nonn,base`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jan 07 2005`

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Last modified March 14 16:07 EDT 2010. Contains 173425 sequences.

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