OFFSET
1,2
COMMENTS
A055067(n) = the product of non-divisors of n.
LINKS
Paolo Xausa, Table of n, a(n) for n = 1..400
FORMULA
a(n) = Sum_{i=1..n} A055067(i).
MATHEMATICA
Accumulate[Array[#!/Times@@Divisors[#] &, 30]]
PROG
(Magma) [&+[Factorial(k) / &*[d: d in Divisors(k)]: k in [1..n]]: n in [1..100]];
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Jan 07 2017
STATUS
approved