OFFSET
0,3
COMMENTS
The second condition is ignored precisely when the positions of the 1's in a(n-1) are a subset of the 1's in a(n-2).
This is a set-theory analog of A352187.
LINKS
N. J. A. Sloane, Table of n, a(n) for n = 0..10000
N. J. A. Sloane, Maple program
EXAMPLE
a(0)=0 and a(1)=1=1_2 are given.
a(2) = 3 = 11_2 is disjoint from a(0) and intersects a(1).
a(3) = 2 = 10_2 is disjoint from a(1) and intersects a(2).
Now there is no choice for a(4) that meets both conditions, so we ignore the no-intersection-with-a(n-2) condition, and take a(4) = 6 = 110_2.
MAPLE
See link.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
N. J. A. Sloane, Mar 26 2022
STATUS
approved