This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A280378 #7 Sep 08 2022 08:46:18
%S A280378 1,1,2,6,144,1440,1036800,326592000,1463132160000,6636767477760000,
%T A280378 24083501823295488000000,278164446059062886400000000,
%U A280378 133241214725404817086218240000000000,1851999588197236795571599048704000000000000,79730449087475946864047275218548293632000000000000
%N A280378 Partial products of A119619.
%C A280378 A119619(n) = Product_{d|n} pxi(d), where pxi(m) is the product of totatives of m (A001783).
%F A280378 a(n) = Product_{i=1..n} A119619(i).
%t A280378 FoldList[#1 #2 &, Table[Product[Times @@ Select[Range@ d, CoprimeQ[d, #] &], {d, Divisors@ n}], {n, 15}]] (* _Michael De Vlieger_, Jan 09 2017 *)
%o A280378 (Magma) [&*[&*[&*[h: h in [1..d] | GCD(h,d) eq 1]: d in Divisors(k)]: k in [1..n]]: n in [1..100]]
%Y A280378 Cf. A119619, A280377.
%K A280378 nonn
%O A280378 1,3
%A A280378 _Jaroslav Krizek_, Jan 08 2017