A278942 Between two successive digits "7" there are 0, then 1, then 2, then 3, ... other digits.

0, 1, 2, 3, 4, 5, 6, 7, 70, 71, 8, 72, 9, 17, 10, 11, 73, 12, 13, 74, 14, 15, 27, 16, 18, 19, 37, 20, 21, 22, 23, 75, 24, 25, 26, 28, 76, 29, 30, 31, 32, 47, 33, 34, 35, 36, 38, 57, 39, 40, 41, 42, 43, 44, 78, 45, 46, 48, 49, 50, 51, 79, 52, 53, 54, 55, 56, 58, 67, 59, 60, 61, 62, 63, 64, 65, 87, 66, 68, 69, 80, 81, 82, 83, 84, 700, 85, 86, 88, 89, 90, 91, 92, 97, 93, 94, 95, 96, 98, 99, 100, 101, 701, 102, 103, 104, 105, 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..1059

Example

There are 0 digit between "7" and "70"; there is 1 digit between the "7" of "70" and the "7" of "71" (this is the "0" of "70"); there are 2 digits between the "7" of "71" and the "7" of "72" (they are the "1" of "71" and the "8" of "8"); there are 3 digits between the "7" of "72" and the "7" of "17" (they are the "2" of "72", the "9" of "9" and the "1" of "17"); etc.

Crossrefs

Sequence in context: A044909 A370776 A273475 * A303166 A024649 A037335

Adjacent sequences: A278939 A278940 A278941 * A278943 A278944 A278945

Keyword

nonn,base

Author

Eric Angelini and Jean-Marc Falcoz, Dec 02 2016

Status

approved