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A362127 Records in A360179. 4
1, 2, 3, 4, 5, 6, 8, 10, 12, 16, 19, 22, 28, 32, 34, 40, 43, 47, 51, 53, 56, 57, 60, 63, 64, 65, 69, 75, 77, 79, 80, 84, 86, 98, 99, 102, 105, 107, 119, 129, 130, 141, 143, 146, 150, 162, 170, 182, 188, 200, 202, 214, 220, 226, 232, 240, 248, 252, 262, 264, 268, 282, 294, 310, 326, 330, 342, 354, 362 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
Michael De Vlieger, Labeled scatterplot of m = A360179(n) for n = 1..512. Records, terms of this sequence, appear in red, local minima in blue, terms following novel m in gold and by extant m in green. The cyan line indicates the smallest number u not in a(1..n) and is not a feature of the sequence itself. The magenta line indicates the "prevailing low" L(n) and is not a feature of the sequence itself.
MATHEMATICA
nn = 10^4; c[_] := False; h[_] := 0; f[n_] := DivisorSigma[0, n];
a[1] = j = u = 1; r = 0;
Reap[Do[
If[c[j],
k = j + f[u]; h[j]++; h[u]--,
k = f[j]; c[j] = True; h[j]++ ];
u = Min[u, j]; Set[{a[n], j}, {k, k}]; While[h[u] == 0, u++];
If[k > r, r = k; Sow[r]], {n, 2, nn}] ][[-1, -1]]
CROSSREFS
Sequence in context: A361319 A018293 A015702 * A364960 A245709 A364565
KEYWORD
nonn
AUTHOR
Michael De Vlieger, Apr 09 2023
STATUS
approved

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Last modified May 28 18:29 EDT 2024. Contains 372919 sequences. (Running on oeis4.)