OFFSET
1,1
COMMENTS
The numbers 717, 720, 759 are also terms with 713 being the only remaining unknown below them.
EXAMPLE
11 is a member because 2^11 - 3 = 2045 = 5 * 409 is a semiprime.
CROSSREFS
KEYWORD
nonn
AUTHOR
Kevin P. Thompson, May 29 2023
STATUS
approved