A278939 Between two successive digits "4" there are 0, then 1, then 2, then 3, ... other digits.

0, 1, 2, 3, 4, 40, 41, 5, 42, 6, 7, 43, 8, 9, 14, 10, 11, 24, 12, 13, 15, 45, 16, 17, 18, 46, 19, 20, 21, 34, 22, 23, 25, 26, 54, 27, 28, 29, 30, 31, 47, 32, 33, 35, 36, 37, 48, 38, 39, 50, 51, 52, 64, 53, 55, 56, 57, 58, 59, 74, 60, 61, 62, 63, 65, 66, 67, 49, 68, 69, 70, 71, 72, 73, 75, 400, 76, 77, 78, 79, 80, 81, 82, 401, 83, 85, 86, 87, 88, 89, 90, 84, 91, 92, 93, 95, 96, 97, 98, 99, 104, 100, 101, 102, 103, 105, 106, 94, 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..1056

Example

There are 0 digit between "4" and "40"; there is 1 digit between the "4" of "40" and the "4" of "41" (this is the "0" of "40"); there are 2 digits between the "4" of "41" and the "4" of "42" (they are the "1" of "41" and the "5" of "5"); there are 3 digits between the "4" of "42" and the "4" of "43" (they are the "2" of "42", the "6" of "6" and the "7" of "7"); etc.

Crossrefs

Sequence in context: A078394 A375477 A273469 * A302943 A037326 A024634

Adjacent sequences: A278936 A278937 A278938 * A278940 A278941 A278942

Keyword

nonn,base

Author

Eric Angelini and Jean-Marc Falcoz, Dec 02 2016

Status

approved