A028343 - cp's OEIS frontend

A028343 Expansion of Product_{i>=1} (1-x^i)^(1/i); also of exp(- Sum_{n>=1}(d(n)*x^n/n)) where d(n) is the number of divisors of n.

n	a(n)
0	1
1	-1
2	-1
3	1
4	-1
5	41
6	-131
7	1499
8	-4159
9	10639
10	100871
11	4142249
12	-111459041
13	1127459321
14	1797229589
15	-185028952109
16	706529394689
17	29136228245279
18	-547852336663409
19	7139784702100049
20	-195178627579232449

[1, -1, -1, 1, -1, 41, -131, 1499, -4159, 10639, 100871, 4142249, -111459041, 1127459321, 1797229589, -185028952109, 706529394689, 29136228245279, -547852336663409, 7139784702100049, -195178627579232449]

cp's OEIS Frontend

A028343 Expansion of Product_{i>=1} (1-x^i)^(1/i); also of exp(- Sum_{n>=1}(d(n)*x^n/n)) where d(n) is the number of divisors of n.

Table of values

List of values