login
A281027
Partial products of A066570.
0
1, 2, 6, 48, 240, 34560, 241920, 92897280, 15049359360, 288947699712000, 3178424696832000, 3954468870810501120000, 51408095320536514560000, 232150733172291613910630400000, 338475768965201173081699123200000000, 3493719809197289292455451813740544000000000
OFFSET
1,2
FORMULA
a(n) = Product_{i=1..n} A066570(i).
PROG
(Magma) [1] cat [&*[&*[h: h in [2..k] | GCD(h, k) ne 1]: k in [2..n]]: n in [2..100]]
CROSSREFS
Cf. A066570(n) = the product of cototatives of n.
Cf. A281025.
Sequence in context: A052657 A230714 A092143 * A271961 A362798 A239836
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Jan 19 2017
STATUS
approved