A086572 Solution to A086571(a(n))=A086571(n) and a(n)<>n.

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

Offset: 1

Author

Reinhard Zumkeller, Jul 22 2003

Keywords

• nonn

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

Examples

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

Links

• Index entries for sequences that are permutations of the natural numbers