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A139224
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M(M-1)/2, where M is Mersenne prime A000668(n).
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7
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3, 21, 465, 8001, 33542145, 8589737985, 137438167041, 2305843005992468481, 2658455991569831742348849606740148225, 191561942608236107294793377465333618488307184098607105
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refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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LINKS
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FORMULA
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CROSSREFS
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Cf. A000217, A000396, A000668, A036689, A139096, A139115, A139116, A139223, A139225, A139226, A139256, A139306.
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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