A278940 Between two successive digits "5" there are 0, then 1, then 2, then 3, ... other digits.

0, 1, 2, 3, 4, 5, 50, 51, 6, 52, 7, 8, 53, 9, 10, 54, 11, 12, 56, 13, 14, 15, 16, 17, 18, 25, 19, 20, 21, 22, 57, 23, 24, 26, 27, 58, 28, 29, 30, 31, 35, 32, 33, 34, 36, 37, 45, 38, 39, 40, 41, 42, 43, 59, 44, 46, 47, 48, 49, 60, 500, 61, 62, 63, 64, 66, 67, 501, 68, 69, 70, 71, 72, 73, 65, 74, 76, 77, 78, 79, 80, 81, 82, 502, 83, 84, 86, 87, 88, 89, 90, 75, 91, 92, 93, 94, 96, 97, 98, 99, 105, 100, 101, 102, 103, 104, 106, 85, 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..1057

Example

There are 0 digit between "5" and "50"; there is 1 digit between the "5" of “50” and the "5" of "51" (this is the "0" of "50"); there are 2 digits between the "5" of "51" and the "5" of "52" (they are the "1" of "51" and the "6" of "6"); there are 3 digits between the "5" of "52" and the "5" of "53" (they are the "2" of "52", the "7" of "7" and the "8" of "8"); etc.

Crossrefs

Sequence in context: A037329 A344848 A173574 * A273470 A303163 A024638

Adjacent sequences: A278937 A278938 A278939 * A278941 A278942 A278943

Keyword

nonn,base

Author

Eric Angelini and Jean-Marc Falcoz, Dec 02 2016

Status

approved