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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 Cf. A119619, A280378. Sequence in context: A102121 A102120 A280820 * A102122 A102123 A102125 Adjacent sequences:  A280374 A280375 A280376 * A280378 A280379 A280380 KEYWORD nonn AUTHOR Jaroslav Krizek, Jan 07 2017 STATUS approved

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Last modified September 19 15:24 EDT 2019. Contains 327198 sequences. (Running on oeis4.)