A036950 Smallest n-digit prime containing only the digits 7 and 9, or 0 if no such prime exists.

7, 79, 797, 0, 77797, 777977, 7777997, 77779799, 777777799, 7777779799, 77777779979, 777777779777, 7777777779977, 77777777777977, 777777777779797, 7777777777797799, 77777777777777797, 777777777777797977

Offset

1,1

Links

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

Crossrefs

Cf. A020471, A036229, A036324.

Sequence in context: A003545 A104094 A220382 * A127890 A198973 A127859

Adjacent sequences: A036947 A036948 A036949 * A036951 A036952 A036953

Keyword

nonn,base

Author

Patrick De Geest, Jan 04 1999

Status

approved