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0, 0, 1, 0, 2, 1, 2, 0, 2, 2, 2, 1, 2, 2, 3, 0, 3, 2, 3, 2, 3, 2, 3, 1, 4, 2, 3, 2, 4, 3, 3, 0, 3, 3, 3, 2, 4, 3, 3, 2, 3, 3, 4, 2, 4, 3, 4, 1, 4, 4, 4, 2, 4, 3, 4, 2, 4, 4, 4, 3, 3, 3, 4, 0, 4, 3, 4, 3, 4, 3, 4, 2, 5, 4, 5, 3, 4, 3, 4, 2, 4, 3, 3, 3, 5, 4, 5, 2, 5, 4, 4, 3, 4, 4, 5, 1, 3, 4, 4, 4, 5, 4, 3, 2, 4
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,5
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LINKS
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Antti Karttunen, Table of n, a(n) for n = 1..65537
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FORMULA
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a(n) = max(A329697(n), A331410(n)).
For all n >= 1, A335904(n) >= A335884(n) >= a(n) >= A335875(n) >= A335885(n).
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PROG
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(PARI)
A329697(n) = { my(f=factor(n)); sum(k=1, #f~, if(2==f[k, 1], 0, f[k, 2]*(1+A329697(f[k, 1]-1)))); };
A331410(n) = { my(f=factor(n)); sum(k=1, #f~, if(2==f[k, 1], 0, f[k, 2]*(1+A331410(f[k, 1]+1)))); };
A335881(n) = max(A329697(n), A331410(n));
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CROSSREFS
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Cf. A329697, A331410, A335875, A335877, A335884, A335885, A335904.
Cf. A329662 (apparently the positions of records).
Sequence in context: A217921 A272328 A334956 * A239703 A029338 A240883
Adjacent sequences: A335878 A335879 A335880 * A335882 A335883 A335884
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KEYWORD
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nonn
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AUTHOR
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Antti Karttunen, Jun 29 2020
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STATUS
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approved
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