OFFSET
1,1
COMMENTS
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..223 (terms 1..106 from Kevin P. Thompson)
EXAMPLE
64665 is a term of this sequence since tau(64665) = tau(64666) = 8 and sigma(64665) = sigma(64666) = 2160, but omega(64665) = 4 and omega(64666) = 3.
MATHEMATICA
Select[Range[10^7], DivisorSigma[{0, 1}, #] == DivisorSigma[{0, 1}, # + 1] && PrimeNu[#] != PrimeNu[# + 1] &] (* Amiram Eldar, Jan 20 2022 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Kevin P. Thompson, Jan 16 2022
STATUS
approved