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A140797 Numbers of the form (2^p^N-1)/(2^p^(N-1)-1), where N>0, p is prime. +0
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3, 5, 7, 17, 31, 73, 127, 257, 2047, 8191, 65537, 131071, 262657, 524287, 1082401, 8388607, 536870911, 2147483647, 4294967297, 137438953471, 2199023255551, 4432676798593, 8796093022207, 140737488355327, 9007199254740991, 18014398643699713, 576460752303423487 (list; graph; listen)
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Last modified December 18 21:37 EST 2009. Contains 171024 sequences.


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