

A278944


Between two successive digits "9" there are 0, then 1, then 2, then 3, ... other digits.


1



0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 90, 91, 19, 10, 29, 11, 12, 92, 13, 14, 93, 15, 16, 39, 17, 18, 20, 49, 21, 22, 23, 24, 94, 25, 26, 27, 28, 95, 30, 31, 32, 33, 59, 34, 35, 36, 37, 38, 69, 40, 41, 42, 43, 44, 45, 96, 46, 47, 48, 50, 51, 52, 97, 53, 54, 55, 56, 57, 58, 79, 60, 61, 62, 63, 64, 65, 66, 89, 67, 68, 70, 71, 72, 73, 74, 75, 98, 76, 77, 78, 80, 81, 82, 83, 84, 900, 85, 86, 87, 88, 100, 101, 109, 102, 103, 104, 105, 106, 107, 190, 108
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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

JeanMarc Falcoz, Table of n, a(n) for n = 1..1061


EXAMPLE

There are 0 digit between "9" and "90"; there is 1 digit between the "9" of "90" and the "9" of "91" (this is the "0" of "90"); there are 2 digits between the "9" of "91" and the "9" of "19" (they are the "1" of "91" and the "1" of "19"); there are 3 digits between the "9" of "19" and the "9" of "29" (they are the "1" of "10", the "0" of "10" and the "2" of "29"); etc.


CROSSREFS

Sequence in context: A250265 A239085 A273478 * A303171 A024664 A078188
Adjacent sequences: A278941 A278942 A278943 * A278945 A278946 A278947


KEYWORD

nonn,base


AUTHOR

Eric Angelini and JeanMarc Falcoz, Dec 02 2016


STATUS

approved



