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A057685
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Trajectory of 19 under the `19x+1' map.
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9
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19, 362, 181, 3440, 1720, 860, 430, 215, 43, 818, 409, 7772, 3886, 1943, 36918, 18459, 6153, 2051, 293, 5568, 2784, 1392, 696, 348, 174, 87, 29, 552, 276, 138, 69, 23, 438, 219, 73, 1388, 694, 347, 6594, 3297, 1099, 157, 2984, 1492, 746
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,1
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COMMENTS
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LINKS
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MATHEMATICA
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Px1[p_, n_]:=Catch[For[i=1, i<PrimePi[p], i++, If[Divisible[n, Prime[i]], Throw[n/Prime[i]]]]; p*n+1];
NestList[Px1[19, #]&, 19, 100] (* Paolo Xausa, Dec 10 2023 *)
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CROSSREFS
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Cf. A057446, A057216, A057522, A057534, A057614. See also A033478, A057688, A057684, A057685, A057686, A057687, A057689, A057690, A057691.
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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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