OFFSET
1,2
COMMENTS
Complement of A072225.
EXAMPLE
6 is in the sequence because prime(6) + prime(7) + prime(8) = 13 + 17 + 19 = 49 is not a prime.
MATHEMATICA
Select[Range[200], !PrimeQ[Prime[#] + Prime[# + 1] + Prime[# + 2]] &]
PROG
(Magma) [n: n in [1..200] | not IsPrime(NthPrime(n) + NthPrime(n+1) + NthPrime(n+2))];
(PARI) for(n=1, 1e2, if(!isprime(prime(n)+prime(n+1)+prime(n+2)), print1(n, ", "))) \\ Altug Alkan, Nov 19 2015
(Sage) [n for n in (1..200) if not is_prime(nth_prime(n) + nth_prime(n+1) + nth_prime(n+2))] # Bruno Berselli, Nov 19 2015
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Nov 18 2015
STATUS
approved