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A093714 a(n) = smallest number coprime to a(n-1), not equal to a(n-1)+1 and not occurring earlier; a(1)=1. 3
1, 3, 2, 5, 4, 7, 6, 11, 8, 13, 9, 14, 17, 10, 19, 12, 23, 15, 22, 21, 16, 25, 18, 29, 20, 27, 26, 31, 24, 35, 32, 37, 28, 33, 38, 41, 30, 43, 34, 39, 44, 47, 36, 49, 40, 51, 46, 45, 52, 55, 42, 53, 48, 59, 50, 57, 56, 61, 54, 65, 58, 63, 62, 67, 60, 71, 64, 69, 68, 73, 66, 79 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Permutation of natural numbers with inverse A093715: a(A093715(n))=A093715(a(n))=n.

LINKS

Table of n, a(n) for n=1..72.

Index entries for sequences that are permutations of the natural numbers

CROSSREFS

Cf. A085229.

Sequence in context: A093715 A277911 A085229 * A080261 A138310 A270197

Adjacent sequences:  A093711 A093712 A093713 * A093715 A093716 A093717

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Apr 12 2004

STATUS

approved

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Last modified May 22 05:45 EDT 2019. Contains 323473 sequences. (Running on oeis4.)