OFFSET
1,1
LINKS
Jinyuan Wang, Table of n, a(n) for n = 1..500
MATHEMATICA
Table[SelectFirst[10#+7&/@FromDigits/@Tuples[{6, 7}, n], PrimeQ], {n, 0, 17}]/. (Missing["NotFound"]->0) (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Apr 08 2019 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Jan 04 1999
STATUS
approved