OFFSET
1,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MATHEMATICA
Join[{3, 5}, Select[Flatten[Table[FromDigits/@(Join[#, {3}]&/@ Tuples[ {3, 4, 5}, n]), {n, 5}]], PrimeQ]] (* Harvey P. Dale, Aug 31 2015 *)
PROG
(PARI) a(n, list=0, L=[3, 4, 5], 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)))}
(Magma) [p: p in PrimesUpTo(4*10^5) | Set(Intseq(p)) subset [3..5]]; // Bruno Berselli, Nov 07 2011
CROSSREFS
KEYWORD
nonn,base
AUTHOR
M. F. Hasler, Nov 05 2011
STATUS
approved