

A199329


Primes with digits '0', '1' and '9' only.


18



11, 19, 101, 109, 191, 199, 911, 919, 991, 1009, 1019, 1091, 1109, 1901, 1999, 9001, 9011, 9091, 9109, 9199, 9901, 10009, 10091, 10099, 10111, 10909, 11119, 11909, 19001, 19009, 19919, 19991, 90001, 90011, 90019, 90191, 90199, 90901, 90911, 91009, 91019, 91099, 91199, 91909, 99109, 99119, 99191, 99901, 99991
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,1


LINKS

Table of n, a(n) for n=1..49.


PROG

(PARI) a(n=50, L=[0, 1, 9], show=0)={my(t); for(d=1, 1e9, u=vector(d, i, 10^(di))~; forvec(v=vector(d, i, [1+(i==1&!L[1]), #L]), ispseudoprime(t=vector(d, i, L[v[i]])*u)next; show&print1(t", "); nreturn(t)))}


CROSSREFS

Cf. A020449  A020472, A199325  A199327.
Sequence in context: A199338 A043188 A043968 * A121132 A238332 A089773
Adjacent sequences: A199326 A199327 A199328 * A199330 A199331 A199332


KEYWORD

nonn,base


AUTHOR

M. F. Hasler, Nov 05 2011


STATUS

approved



