OFFSET
1,2
COMMENTS
Includes semiprimes k such that k + 2 is a triprime.
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
EXAMPLE
a(5) = 25 is a term because Omega(25) = 2, Omega(2) = 1 and Omega(25 + 2) = Omega(27) = 3 = 2 + 1.
MAPLE
filter:= proc(k) uses numtheory; local s;
s:= bigomega(k);
bigomega(k+s) = s + bigomega(s)
end proc:
select(filter, [$1..1000]);
CROSSREFS
KEYWORD
nonn
AUTHOR
Robert Israel, Oct 06 2024
STATUS
approved