A275513 The successive block-sizes of digits "1" in the sequence are given by the sequence itself.

1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 20, 21, 110, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 111, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 1111, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 11111, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 111111, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 1111111, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 11111111, 82, 83, 84, 85, 86, 87, 88, 89, 90

Offset

1,2

Comments

The sequence starts with a(1)=1 and was always extended with the smallest integer not yet used that does not lead to a contradiction.

Links

Table of n, a(n) for n=1..88.

Example

The blocks of digits "1" are indicated here by parentheses; the successive block-sizes are 1, 2, 3, 4,... which reproduces the sequence itself:
(1),2,3,4,5,6,7,8,9,(11),20,2(1,11)0,22,23,24,25,26,27,28,29,30,3(1,111),32,33,...

Crossrefs

Sequence in context: A344749 A247753 A267771 * A336668 A038724 A106001

Adjacent sequences: A275510 A275511 A275512 * A275514 A275515 A275516

Keyword

nonn,base

Author

Eric Angelini, Jul 31 2016

Status

approved