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A297001
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Numbers k such that A296992(k) = 2.
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1
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3, 9, 12, 18, 21, 27, 36, 40, 42, 48, 54, 72, 81, 84, 108, 120, 135, 144, 162, 168, 189, 192, 216, 243, 270, 280, 324, 336, 360, 378, 432, 448, 486, 540, 576, 640, 648, 672, 729, 756, 768, 828, 840, 864, 945, 972, 1080, 1152, 1296, 1344, 1458, 1512, 1701, 1728, 1890
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listen;
history;
text;
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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1 + Position[Table[-1 + SelectFirst[Range[0, 5], !Divisible[RamanujanTau@ n, n^#] &], {n, 2, 2000}], 2][[All, 1]] (* Michael De Vlieger, Dec 23 2017 *)
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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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