A305660 Look-and-Say sequence in base 3/2.

1, 11, 21, 1211, 111221, 2012211, 1210112221, 111211102120211, 2011220110121112101221, 121021221021101112201121110112211, 1112111012112211101221102012210211220110212221

Offset

1,2

Comments

Each term has at most 1 zero, 3 ones, and 3 twos in a row.

The first five terms are the same as in Look-and-Say sequence in base 10: A005150.

Links

Table of n, a(n) for n=1..11.

B. Chen, R. Chen, J. Guo, S. Lee et al., On Base 3/2 and its sequences, arXiv:1808.04304 [math.NT], 2018.

Example

In base 3/2, the integer 3 is written as 20. Therefore, the next term after 111221 is 2012211: "20 ones, 2 twos, 1 one."

Crossrefs

Cf. A005150, A024629.

Sequence in context: A063850 A005150 A001388 * A110393 A202627 A257491

Adjacent sequences: A305657 A305658 A305659 * A305661 A305662 A305663

Keyword

nonn,base

Author

Tanya Khovanova and PRIMES STEP Senior group, Jun 07 2018

Status

approved