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A280377 Partial sums of A119619. 1
1, 2, 4, 7, 31, 41, 761, 1076, 5556, 10092, 3638892, 3650442, 482652042, 496551642, 539602650, 1178115525, 20923968003525, 20925873907525, 6423299579635525, 6423418373678893, 6491526825518893, 11027299390478893, 1124011755076998158893, 1124011800169644507643 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
A119619(n) = Product_{d|n} pxi(d), where pxi(m) is the product of totatives of m (A001783).
LINKS
FORMULA
a(n) = Sum_{i=1..n} A119619(i).
PROG
(Magma) [&+[&*[&*[h: h in [1..d] | GCD(h, d) eq 1]: d in Divisors(k)]: k in [1..n]]: n in [1..100]]
CROSSREFS
Sequence in context: A102121 A102120 A280820 * A102122 A102123 A102125
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Jan 07 2017
STATUS
approved

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Last modified August 29 21:13 EDT 2024. Contains 375518 sequences. (Running on oeis4.)