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A074039
If (n, n+2) is the k-th twin prime pair then k else 0.
1
0, 0, 1, 0, 2, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
OFFSET
1,5
COMMENTS
A001359(a(n)) = n, A006512(a(n)) = n+2.
CROSSREFS
Sequence in context: A356303 A238429 A332671 * A047764 A022883 A284270
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Aug 13 2002
STATUS
approved