A317962 To get a(n), apply the morphism 1 -> 1121, 2-> 2 n times to 1.

1, 1121, 1121112121121, 1121112121121112111212112121121112121121, 1121112121121112111212112121121112121121112111212112111211121211212112111212112121121112121121112111212112121121112121121

Offset: 1

Author

N. J. A. Sloane, Aug 24 2018

Keywords

• nonn

Comments

These are stages in the growth of the Chacon sequence over the alphabet {1,2}. See A049320 for further information and references.

Examples

			Over the more usual alphabet {0,1} these strings would be:
0
0010
0010001010010
0010001010010001000101001010010001010010
0010001010010001000101001010010001010010001000101001000100010100101001000101001010010001010010001000101001010010001010010
...
		

Links

• Seiichi Manyama, Table of n, a(n) for n = 1..6

Crossrefs

Cf. A003462, A049320, A133162.

Extensions

Offset 1 by Seiichi Manyama, Aug 24 2018