A346810 There are a(n) digits between a(n) and the next copy of the string a(n). This is the lexicographically earliest sequence of distinct positive terms with this property.

1, 2, 10, 20, 3, 4, 7, 8, 30, 40, 107, 5, 80, 9, 6, 15, 11, 206, 19, 12, 13, 21, 111, 50, 300, 120, 131, 90, 140, 14, 210, 16, 17, 18, 25, 26, 31, 41, 29, 23, 160, 170, 180, 22, 27, 502, 51, 260, 802, 33, 1290, 24, 32, 200, 410, 270, 34, 1070, 35, 28, 37, 42, 47, 330

Offset

1,2

Comments

A self-describing sequence.

Links

Table of n, a(n) for n=1..64.

Example

a(1) = 1; there is 1 digit between a(1) and the "1" of 10: this is the digit 2;
a(2) = 2; there are 2 digits between a(2) and the "2" of 20: they are 1 and 0;
a(3) = 10; there are 10 digits between a(3) and the "10" of 107: they are 2, 0, 3, 4, 7, 8, 3, 0, 4 and 0;
a(4) = 20; there are 20 digits between a(4) and the "20" of 206: they are 3, 4, 7, 8, 3, 0, 4, 0, 1, 0, 7, 5, 8, 0, 9, 6, 1, 5, 1 and 1;
a(5) = 3; there are 3 digits between a(5) and the "3" of 30: they are 4, 7 and 8;
a(6) = 4; there are 4 digits between a(6) and the "4" of 40: they are 7, 8, 3 and 0;
a(7) = 7; there are 7 digits between a(7) and the "7" of 107: they are 8, 3, 0, 4, 0, 1 and 0; etc.

Crossrefs

Cf. A303151.

Sequence in context: A317859 A342543 A342539 * A347024 A009342 A357486

Adjacent sequences: A346807 A346808 A346809 * A346811 A346812 A346813

Keyword

base,nonn

Author

Eric Angelini and Carole Dubois, Aug 05 2021

Status

approved