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A056022
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Numbers k such that k^6 == 1 (mod 7^2).
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11
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1, 18, 19, 30, 31, 48, 50, 67, 68, 79, 80, 97, 99, 116, 117, 128, 129, 146, 148, 165, 166, 177, 178, 195, 197, 214, 215, 226, 227, 244, 246, 263, 264, 275, 276, 293, 295, 312, 313, 324, 325, 342, 344, 361, 362, 373, 374, 391, 393, 410, 411, 422, 423, 440, 442
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OFFSET
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1,2
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LINKS
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MATHEMATICA
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Select[ Range[ 500 ], PowerMod[ #, 6, 49 ]==1& ]
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PROG
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(PARI) isok(k) = Mod(k, 49)^6 == 1; \\ Michel Marcus, Jun 30 2021
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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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STATUS
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approved
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