OFFSET
1,1
COMMENTS
All terms end in 3 and those > 3 never have the same number of 4's and 8's.
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MATHEMATICA
Table[Select[FromDigits/@Tuples[{3, 4, 8}, n], PrimeQ], {n, 6}]//Flatten (* Harvey P. Dale, Apr 09 2022 *)
PROG
(PARI) a(n, list=0, L=[3, 4, 8], 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