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A057613
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Numbers that are both lucky numbers (A000959) and of form 2^k-1 (A000225).
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0
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1, 3, 7, 15, 31, 63, 127, 511, 1023, 4095, 8191, 131071, 524287, 2097151, 4194303, 8388607, 33554431, 67108863, 8589934591
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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a(7) = 127 since A000959(27) = A000225(7) = 127 and it is the 7th such number with this property.
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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More terms from Mark Weston (mweston(AT)uvic.ca), Oct 16 2001
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STATUS
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approved
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