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A138841
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Concatenation of initial and final digit of n-th Mersenne prime A000668(n).
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8
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33, 77, 31, 17, 81, 11, 57, 27, 21, 61, 17, 17, 61, 57, 17, 17, 41, 21, 11, 27, 41, 31, 21, 41, 41, 41, 81, 57, 57, 51, 77, 17, 11, 47, 81, 61, 11, 41, 91, 17, 27, 17, 31, 11, 27, 11, 31
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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FORMULA
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EXAMPLE
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a(5)=81 because the 5th Mersenne prime is 8191, A000668(5)=8191.
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CROSSREFS
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KEYWORD
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base,nonn,more,less
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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