OFFSET
1,1
COMMENTS
Has positive density in the positive integers, which can be proved by considering only those numbers obtained using the primes 2 and 3.
EXAMPLE
For example, 26 is such a number because 26 in base 2 is 11010, which can be written as the concatenation (11)(010).
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Jeffrey Shallit, Jan 25 2018
STATUS
approved