OFFSET
1,1
COMMENTS
A comparison of this sequence with A067368 suggests the following conjecture: a(n)=2*A067368(n)+n-1. This has been confirmed for several hundred terms.
Above conjecture is true, and it is same as conjecture in Formula section of A067368. - Altug Alkan, Sep 26 2018
The asymptotic density of this sequence is 1/8. - Amiram Eldar, May 31 2024
LINKS
Altug Alkan, Table of n, a(n) for n = 1..1000
EXAMPLE
A067395 begins {4,4,4,2,2,4,4,4,4,...}, so a(1)=4.
CROSSREFS
KEYWORD
nonn
AUTHOR
John W. Layman, Jan 22 2002
STATUS
approved