OFFSET
1,2
COMMENTS
Except for the first term, all terms are prime. There is at most one more term.
MATHEMATICA
nn = 250; t = Select[Union[Flatten[Table[a*b + b*c + a*c + 1, {a, nn}, {b, a, nn}, {c, b, nn}]]], # <= 2*nn + 1 &]; Complement[Range[2*nn + 1], t]
CROSSREFS
KEYWORD
nonn,fini
AUTHOR
T. D. Noe, Sep 13 2013
STATUS
approved