OFFSET
1,1
LINKS
Alois P. Heinz, Table of n, a(n) for n = 1..10000
MATHEMATICA
Select[Prime[Range[2 10^3]], Complement[IntegerDigits[#], {1, 3, 7}]=={} &]
PROG
(Magma) [p: p in PrimesUpTo(2*10^4) | Set(Intseq(p)) subset [1, 3, 7]];
CROSSREFS
KEYWORD
nonn,easy,base
AUTHOR
Vincenzo Librandi, Jul 24 2015
STATUS
approved