A278938 Between two successive digits "2" there are 0, then 1, then 2, then 3, ... other digits.

0, 1, 2, 20, 21, 3, 23, 4, 5, 24, 6, 7, 8, 25, 9, 10, 12, 11, 13, 14, 26, 15, 16, 17, 27, 18, 19, 30, 32, 31, 33, 34, 35, 42, 36, 37, 38, 39, 40, 28, 41, 43, 44, 45, 46, 29, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 62, 59, 60, 61, 63, 64, 65, 66, 200, 67, 68, 69, 70, 71, 73, 72, 74, 75, 76, 77, 78, 79, 80, 81, 201, 83, 84, 85, 86, 87, 88, 89, 82, 90, 91, 93, 94, 95, 96, 97, 98, 99, 203, 100, 101, 103, 104, 105, 102, 106, 107, 108, 109

Offset

1,3

Comments

The sequence starts with a(1) = 0 and is always extended with the smallest integer not yet present that does not lead to a contradiction.

Links

Jean-Marc Falcoz, Table of n, a(n) for n = 1..1054

Example

There are 0 digit between "2" and "20"; there is 1 digit between the “2” of "20" and the "2" of "21" (this is the "0" of "20"); there are 2 digits between the "2" of "21" and the "2" of "23" (they are the "1" of "21" and the "3" of "3"); there are 3 digits between the "2" of "23" and the "2" of "24" (they are the "3" of "23", the "4" of "4" and the "5" of "5"); etc.

Crossrefs

Sequence in context: A261753 A075031 A273466 * A303157 A338994 A217394

Adjacent sequences: A278935 A278936 A278937 * A278939 A278940 A278941

Keyword

nonn,base

Author

Eric Angelini and Jean-Marc Falcoz, Dec 02 2016

Status

approved