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A362132 Records in A362131. 3
2, 3, 4, 5, 6, 7, 9, 11, 13, 14, 17, 20, 21, 23, 29, 35, 37, 38, 44, 46, 50, 94, 100, 120, 121, 124, 125, 136, 139, 140, 142, 144, 148, 178, 185, 186, 187, 189, 193, 195, 197, 201, 203, 209 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
No more records in A362131(n) for n <= 2^28.
LINKS
MATHEMATICA
nn = 2^20;
c[_] := False; q[_] := False; h[_] := 0; f[n_] := DivisorSigma[0, n];
a[1] = j = u = w = 1;
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], q[k], j}, {k, True, k}];
While[h[u] == 0, u++];
If[k == w, While[q[w], w++]; Sow[w]], {n, 2, nn}] ][[-1, -1]]
CROSSREFS
Sequence in context: A180711 A363938 A032957 * A210845 A057202 A277417
KEYWORD
nonn,more
AUTHOR
Michael De Vlieger, Apr 10 2023
STATUS
approved

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Last modified June 19 17:03 EDT 2024. Contains 373504 sequences. (Running on oeis4.)