A036933 Smallest n-digit prime containing only digits 1 and 6, or 0 if no such prime exists.

0, 11, 661, 6661, 11161, 111611, 1111661, 11111161, 111616111, 1111161661, 11111111611, 111111111611, 1111111111661, 11111111616611, 111111111116111, 1111111111616161, 11111111111611661, 111111111111111161

Offset

1,2

Links

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

Mathematica

Join[{0}, Flatten[Table[Select[Sort[FromDigits/@Tuples[{1, 6}, i]], PrimeQ, 1], {i, 2, 20}]]] (* Harvey P. Dale, May 06 2014 *)

Crossrefs

Cf. A020454, A036229, A036306.

Sequence in context: A237187 A201175 A211401 * A195889 A195519 A218716

Adjacent sequences: A036930 A036931 A036932 * A036934 A036935 A036936

Keyword

nonn,base

Author

Patrick De Geest, Jan 04 1999

Status

approved