OFFSET
1,2
EXAMPLE
30 is a term because: 30 = 2*3*5 is squarefree and is not a member of a twin primes pair.
MATHEMATICA
Select[Range@ 123, SquareFreeQ@ # && ! And[PrimeQ@ #, Total@ Boole@ PrimeQ[# + {-2, 2}] >= 1] &] (* Michael De Vlieger, Feb 04 2017 *)
PROG
(PARI) {
for(n=1, 1000,
mb=moebius(n);
if(mb<>0,
if(isprime(n),
if(!isprime(n-2)&&!isprime(n+2),
print1(n", ")
),
; print1(n", ")
)
)
)
}
CROSSREFS
KEYWORD
nonn
AUTHOR
Dimitris Valianatos, Feb 03 2017
STATUS
approved