OFFSET
1,3
LINKS
EXAMPLE
In the range ]2^2,2^3] 5 (101 in binary) is the only such prime thus a(1) = 1.
Similarly, in the range ]2^4,2^5] 19 (10011 in binary) is also unique in that respect, thus a(2) = 1 as well.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Antti Karttunen, Jun 01 2004
EXTENSIONS
a(17)-a(20) from Amiram Eldar, Jun 13 2024
STATUS
approved