

A328991


a(n) = concatenation of a(n1),2,a(n2),2,a(n1), with a(1)=1, a(2)=1221.


3




OFFSET

1,2


COMMENTS

In the Allombert et al. (2018) paper the sequence starts with a(0) = the empty string.


REFERENCES

Allombert, Bill, Nicolas Brisebarre, and Alain Lasjaunias. "On a twovalued sequence and related continued fractions in power series fields." The Ramanujan Journal 45.3 (2018): 859871. See W_n in Theorem 2.


LINKS



CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



