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A236752
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Primes of the form k*2^(k-1) - 1.
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3
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3, 11, 31, 79, 191, 5119, 245759, 524287, 1114111, 3758096383, 1618481116086271, 653980173926178609468673073657929531391, 5359447279004780799548150067050349330431
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OFFSET
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1,1
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COMMENTS
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Corresponding values of k: 2, 3, 4, 5, 6, 10, 15, 16, 17, 28, 46, 123, ...
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LINKS
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EXAMPLE
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79 is in this sequence because it is prime and for k = 5, k*2^(k-1) - 1 = 5*2^(5-1) - 1 = 79.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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More terms and corrections of terms and comments by Ralf Stephan, Feb 03 2014
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STATUS
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approved
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