A102663 Lexicographically earliest increasing sequence whose k-th digit is the absolute difference between the two digits touching the k-th comma.

1, 2, 4, 80, 81, 100, 800, 1000, 1001, 1002, 2000, 8001, 10001, 10002, 10003, 30001, 100001, 100002, 100003, 300001, 1000000, 1000001, 2000001, 10000001, 10000002, 40000000, 200000001, 1000000001, 1000000002, 2000000000, 8000000001, 10000000001, 10000000002

Offset

1,2

Links

Table of n, a(n) for n=1..33.

Example

The first comma is touched by digits 1 and 2 which subtracted absolutely give 1, the first digit of the sequence.
The 2nd comma is touched by digits 2 and 4 which subtracted absolutely give 2, the 2nd digit of the sequence.
The 3rd comma is touched by digits 4 and 8 which subtracted absolutely give 4, the 3rd digit of the sequence.

Crossrefs

Cf. A334336.

Sequence in context: A018389 A334336 A092932 * A322704 A076961 A012439

Adjacent sequences: A102660 A102661 A102662 * A102664 A102665 A102666

Keyword

base,easy,nonn

Author

Eric Angelini and Alexandre Wajnberg, Feb 03 2005

Extensions

a(15) corrected and a(16) onwards from Mohammed Yaseen, Jul 10 2021

Status

approved