A036930 Smallest n-digit prime containing only digits 1 and 3, or 0 if no such prime exists.

3, 11, 113, 3313, 11113, 113111, 1111333, 11111131, 111111113, 1111113313, 11111111113, 111111133333, 1111111111333, 11111111113133, 111111111113113, 1111111111313131, 11111111111131333, 111111111111111131

Offset

1,1

Links

Jinyuan Wang, Table of n, a(n) for n = 1..500

Mathematica

Flatten[Table[Select[FromDigits/@Tuples[{1, 3}, n], PrimeQ, 1], {n, 18}]] (* Harvey P. Dale, Jul 23 2012 *)

Crossrefs

Cf. A020451, A036229, A036303.

Sequence in context: A131546 A275338 A068693 * A198085 A319749 A209107

Adjacent sequences: A036927 A036928 A036929 * A036931 A036932 A036933

Keyword

nonn,base

Author

Patrick De Geest, Jan 04 1999

Extensions

Corrected by Harvey P. Dale, Jul 23 2012

Status

approved