OFFSET
1,2
FORMULA
a(1) = 1; for n>1, a(n) = Product_{i=2..n} A067392(i).
PROG
(Magma) [1] cat [&*[&+[h: h in [2..k] | GCD(h, k) ne 1]: k in [2..n]]: n in [2..100]]
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Jan 14 2017
STATUS
approved