OFFSET
1,1
COMMENTS
Subsequence of A017185 (9n+2).
Composites == 11 mod 18. - Robert Israel, Sep 24 2014
LINKS
Odimar Fabeny, Table of n, a(n) for n = 1..10000
MAPLE
remove(isprime, [seq(18*k+11, k=1..1000)]); # Robert Israel, Sep 24 2014
MATHEMATICA
Select[18Range[100] + 11, Not[PrimeQ[#]] &] (* Alonso del Arte, Sep 25 2014 *)
Select[Range[11, 2000, 18], CompositeQ] (* Harvey P. Dale, Oct 29 2023 *)
PROG
(PARI) lista(nn) = {forcomposite(n=1, nn, if ((n % 2) && ((n % 9) == 2), print1(n, ", ")); ); } \\ Michel Marcus, Sep 22 2014
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Odimar Fabeny, Sep 22 2014
STATUS
approved