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A218574
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Numbers k such that k^2 + 1 is divisible by a 7th power.
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1
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32318, 45807, 110443, 123932, 188568, 202057, 266693, 280182, 344818, 358307, 422943, 436432, 501068, 514557, 579193, 592682, 657318, 670807, 735443, 748932, 813568, 827057, 891693, 905182, 969818, 983307
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OFFSET
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1,1
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LINKS
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EXAMPLE
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32318 is in the sequence because 32318^2 + 1 = 5 ^ 7 * 29 * 461.
6826318 is in the sequence because 6826318^2 + 1 = 5 ^ 3 * 13 ^ 8 * 457.
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MATHEMATICA
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Select[Range[2, 1500000], Max[Transpose[FactorInteger[#^2+1]][[2]]]>6&]
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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