%I #6 Sep 08 2022 08:46:18

%S 1,2,4,7,31,41,761,1076,5556,10092,3638892,3650442,482652042,

%T 496551642,539602650,1178115525,20923968003525,20925873907525,

%U 6423299579635525,6423418373678893,6491526825518893,11027299390478893,1124011755076998158893,1124011800169644507643

%N Partial sums of A119619.

%C A119619(n) = Product_{d|n} pxi(d), where pxi(m) is the product of totatives of m (A001783).

%F a(n) = Sum_{i=1..n} A119619(i).

%o (Magma) [&+[&*[&*[h: h in [1..d] | GCD(h,d) eq 1]: d in Divisors(k)]: k in [1..n]]: n in [1..100]]

%Y Cf. A119619, A280378.

%K nonn

%O 1,2

%A _Jaroslav Krizek_, Jan 07 2017