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A086572 Solution to A086571(a(n))=A086571(n) and a(n)<>n. 9
2, 1, 9, 6, 10, 4, 14, 12, 3, 5, 22, 8, 26, 7, 45, 32, 34, 24, 38, 30, 63, 11, 46, 18, 50, 13, 36, 42, 58, 20, 62, 16, 99, 17, 70, 27, 74, 19, 117, 100, 82, 28, 86, 66, 15, 23, 94, 60, 98, 25, 153, 78, 106, 72, 110, 84, 171, 29, 118, 48, 122, 31, 21, 80, 130, 44, 134 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Well defined as each number occurs exactly twice in A086571;

a self-inverse permutation of natural numbers: a(a(n))=n.

A086938(n) = a(A086939(n)), A086939(n) = a(A086938(n)). - Reinhard Zumkeller, Jul 24 2003

LINKS

Table of n, a(n) for n=1..67.

Index entries for sequences that are permutations of the natural numbers

EXAMPLE

A086571(8)=4 and A086571(12)=4, therefore a(8)=12 and a(12)=8.

CROSSREFS

Sequence in context: A201685 A120671 A245461 * A316606 A016632 A176400

Adjacent sequences:  A086569 A086570 A086571 * A086573 A086574 A086575

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Jul 22 2003

STATUS

approved

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Last modified January 20 16:38 EST 2019. Contains 319335 sequences. (Running on oeis4.)