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A171058
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Numbers k such that 3^k + 3*k + 1 is prime.
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4
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0, 1, 3, 41, 45, 83, 95, 181, 193, 195, 311, 325, 901, 1825, 3649, 7709, 16335, 45547
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OFFSET
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1,3
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LINKS
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PROG
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CROSSREFS
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Numbers k such that b^k + b*k + 1 is prime: A301634 (b=2), this sequence (b=3), A301635 (b=5).
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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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STATUS
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approved
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