OFFSET
1,1
LINKS
MATHEMATICA
Select[Flatten[Table[FromDigits/@Tuples[{3, 4, 7}, n], {n, 5}]], PrimeQ] (* Harvey P. Dale, Jul 31 2012 *)
PROG
(PARI) a(n, list=0, L=[3, 4, 7], reqpal=0)={my(t); for(d=1, 1e9, u=vector(d, i, 10^(d-i))~; forvec(v=vector(d, i, [1+(i==1&!L[1]), #L]), isprime(t=vector(d, i, L[v[i]])*u) || next; reqpal & !isprime(A004086(t)) & next; list & print1(t", "); n--|return(t)))}
CROSSREFS
KEYWORD
nonn,base
AUTHOR
M. F. Hasler, Nov 05 2011
STATUS
approved