OFFSET
1,1
EXAMPLE
5 is a term because 5^2-1 = 24 = 3*8 = (2^2-1)*(3^2-1)
26 is a term because 26^2-1 = 675 = 3*15*15 = (2^2-1)*(4^2-1)^2. (This is the first term that requires more than two factors.)
CROSSREFS
KEYWORD
nonn
AUTHOR
Pontus von Brömssen, Jun 19 2023
STATUS
approved