A329127 Lexicographically earliest sequence of distinct positive integers such that the concatenation of the odd-indexed terms equals the concatenation of the even-indexed terms.

1, 11, 12, 2, 3, 31, 13, 32, 21, 14, 4, 5, 51, 15, 52, 22, 23, 33, 34, 41, 16, 6, 7, 71, 17, 72, 24, 42, 25, 53, 35, 54, 43, 36, 61, 18, 8, 9, 91, 19, 92, 26, 62, 27, 73, 37, 74, 44, 45, 55, 56, 63, 38, 81, 110, 10, 20, 201, 111, 112, 28, 82, 29, 93, 39, 94

Offset

1,2

Comments

Leading zeros are ignored.

Links

Rémy Sigrist, Table of n, a(n) for n = 1..10000

Rémy Sigrist, PARI program for A329127

Example

The first terms of the odd and even bisections are:
    +------+-+---+-+---+---+-+---+---+---+---+---+-+---+---+---+---+---+---+
    | odd  |1|1 2|3|1 3|2 1|4|5 1|5 2|2 3|3 4|1 6|7|1 7|2 4|2 5|3 5|4 3|6 1| ...
    +------+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    | even |1 1|2|3 1|3 2|1 4|5|1 5|2 2|3 3|4 1|6|7 1|7 2|4 2|5 3|5 4|3 6|1 8| ...
    +------+---+-+---+---+---+-+---+---+---+---+-+---+---+---+---+---+---+---+

Prog

(PARI) See Links section.

Crossrefs

Cf. A197124.

Sequence in context: A178496 A186433 A342076 * A076654 A264811 A352389

Adjacent sequences: A329124 A329125 A329126 * A329128 A329129 A329130

Keyword

nonn,base

Author

Rémy Sigrist, Nov 05 2019

Status

approved