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A336844 a(n) = A336698(A003961(n)). 7
1, 1, 1, 7, 1, 1, 1, 3, 1, 1, 1, 5, 5, 1, 1, 61, 3, 1, 1, 7, 5, 1, 1, 1, 29, 5, 5, 5, 1, 1, 5, 23, 11, 3, 1, 101, 11, 1, 7, 3, 3, 5, 1, 23, 1, 1, 7, 91, 67, 29, 1, 59, 1, 5, 1, 1, 5, 1, 1, 5, 9, 5, 47, 547, 5, 11, 5, 33, 23, 1, 19, 39, 3, 11, 43, 5, 11, 7, 11, 61, 391, 3, 23, 59, 3, 1, 1, 9, 25, 1, 7, 49, 29, 7, 1, 137 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
LINKS
FORMULA
a(n) = A000265(1+A000265(A003973(n))).
a(n) = A336698(A003961(n)) = A336699(A003961(n)).
PROG
(PARI)
A000265(n) = (n>>valuation(n, 2));
A003973(n) = { my(f = factor(n)); for(i=1, #f~, f[i, 1] = nextprime(f[i, 1]+1)); sigma(factorback(f)); };
CROSSREFS
Sequence in context: A174544 A168423 A350071 * A072101 A366894 A088840
KEYWORD
nonn
AUTHOR
Antti Karttunen, Aug 06 2020
STATUS
approved

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Last modified March 18 22:56 EDT 2024. Contains 370952 sequences. (Running on oeis4.)