A361104 a(n) = k such that A361103(k-1) = n, or -1 if n never appears in A361103.

1, 2, 3, 17, 9, 4, 8, 31, 15, 7, 5, 47, 64, 6, 21, 10, 96, 20, 11, 13, 57, 38, 14, 16, 79, 37, 18, 12, 160, 28, 22, 19, 61, 24, 26, 23, 131, 52, 27, 25, 41, 33, 46, 29, 77, 45, 42, 34, 54, 59, 36, 32, 68, 72, 44, 40, 104, 82, 50, 49, 75, 111, 51, 35, 98, 143, 63, 30, 85

Offset

1,2

Comments

Imagine the offset of A361103 is 1, and assume it really is a permutation of the natural numbers. In tabular form, it is

..1..2..3..4..5..6..7..8..9.10.11...

..1..2..3..6.11.14.10..7..5.16..19...

Then the inverse permutation would be

..1..2..3.17..9..4..8.31.15..7..5.47...

which is the present sequence.

Links

N. J. A. Sloane, Table of n, a(n) for n = 1..2721

Example

A361103(16) = 4, so a(4) = 17.

Crossrefs

Cf. A360519, A361102, A336957, A361103.

Sequence in context: A073125 A171240 A078201 * A090913 A176236 A171139

Adjacent sequences: A361101 A361102 A361103 * A361105 A361106 A361107

Keyword

nonn

Author

Scott R. Shannon and N. J. A. Sloane, Mar 02 2023

Extensions

Edited by N. J. A. Sloane, Mar 04 2023

Status

approved