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A110059
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Smallest prime ending a complete Cunningham chain of the second kind (2x-1) of length n.
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4
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11, 13, 5, 17041, 24481, 12338881, 1065601, 1985902081, 219416417281, 105230562877441, 1422461638625281, 444124661486837761, 3105111850422067201
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OFFSET
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1,1
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COMMENTS
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"Complete" means that the chain is not part of a longer chain.
A005603 has the first prime of each chain.
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LINKS
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EXAMPLE
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a(4)=17041 because 2131,4261,8521,17041 are prime, but the preceding and following numbers (1066,34081) are not.
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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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Some terms computed by Gilles Sadowski.
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STATUS
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approved
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