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A153355
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Numbers k such that 5k-1 is a prime.
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3
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4, 6, 12, 16, 18, 22, 28, 30, 36, 40, 46, 48, 54, 70, 72, 76, 78, 82, 84, 88, 90, 96, 100, 102, 114, 120, 124, 132, 142, 144, 148, 154, 162, 166, 168, 172, 184, 186, 202, 204, 208, 210, 214, 222, 226, 246, 250, 252, 256, 258, 264, 280, 282, 286, 288, 292, 298
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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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EXAMPLE
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5*4 - 1 = 19 is a prime, so 4 is a term;
5*30 - 1 = 149 is a prime, so 30 is a term.
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MATHEMATICA
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PROG
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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