OFFSET
1,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
MATHEMATICA
ok[1]=True; ok[n_]:=And@@(Mod[#, 7]==3&)/@FactorInteger[n][[All, 1]]; Select[Range[3000], ok] (* Vincenzo Librandi, Aug 20 2012 *)
PROG
(Magma) [n: n in [1..1000] | forall{d: d in PrimeDivisors(n) | d mod 7 eq 3}]; // Vincenzo Librandi, Aug 20 2012
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
Offset changed from 0 to 1 by Vincenzo Librandi, Aug 20 2012
STATUS
approved