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A098708
a(n) = gcd(A098707(n), A098707(n+1)).
1
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 6, 8, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 9, 9, 9, 9, 9, 9, 7, 7, 2, 2, 2
OFFSET
1,1
COMMENTS
a(n) = decimal digit occurring exactly once in A098707(n) and A098707(n+1);
1 < a(n) <= 9.
CROSSREFS
Sequence in context: A346622 A103380 A309120 * A067394 A337301 A076925
KEYWORD
nonn,base
AUTHOR
Reinhard Zumkeller, Sep 21 2004
STATUS
approved