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A036950 Smallest n-digit prime containing only digits 7 and 9, or 0 if no such prime exists. 0
7, 79, 797, 0, 77797, 777977, 7777997, 77779799, 777777799, 7777779799, 77777779979, 777777779777, 7777777779977, 77777777777977, 777777777779797, 7777777777797799, 77777777777777797, 777777777777797977 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..18.

CROSSREFS

Cf. A036229, A020471, 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

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Last modified November 28 14:16 EST 2014. Contains 250361 sequences.