

A273876


The successive numbers of digits visible between two odd terms are given by the sequence itself.


0



0, 1, 3, 2, 5, 4, 6, 8, 7, 10, 9, 12, 100, 11, 14, 16, 13, 18, 20, 22, 15, 24, 26, 28, 30, 17, 32, 34, 102, 19, 36, 38, 40, 42, 44, 21, 46, 48, 50, 104, 23, 52, 54, 56, 58, 60, 62, 25, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 106, 108, 110, 112, 114, 116, 118, 120, 122, 124, 126, 128, 130, 132, 134, 136, 138, 140, 142, 144, 1000, 27, 146, 148, 10000, 29
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OFFSET

1,3


COMMENTS

The sequence starts with a(1)=0. It is then extended with the smallest integer not yet present and not leading to a contradiction. This sequence is a permutation of the integers >=0.


LINKS

Table of n, a(n) for n=1..92.


EXAMPLE

The first two odd terms that appear in the sequence are 1 and 3; between 1 and 3 there are 0 digits and this 0 corresponds to the starting 0 of the sequence.
The next odd term is 5; between 3 and 5 there is 1 digit [which is 2] and this 1 corresponds to the second term of the sequence.
The next odd term is 7; between 5 and 7 there are 3 digits [which are 4, 6 and 8] and this 3 corresponds to the third term of the sequence.
The next odd term is 9; between 7 and 9 there are 2 digits [which are 1 and 0] and this 2 corresponds to the fourth term of the sequence.
The next odd term is 11; between 9 and 11 there are 5 digits [which are 1, 2, 1, 0 and 0] and this 5 corresponds to the fifth term of the sequence. Etc.


CROSSREFS

Sequence in context: A266089 A193231 A191672 * A273865 A286294 A117303
Adjacent sequences: A273873 A273874 A273875 * A273877 A273878 A273879


KEYWORD

nonn,base


AUTHOR

Eric Angelini, Jun 02 2016


STATUS

approved



