A305209 - cp's OEIS frontend

A305209 a(n) = [x^n] exp(Sum_{k>=1} (-1)^(k+1)x^k/(k(1 - n*x^k))).

n	a(n)
0	1
1	1
2	2
3	12
4	86
5	885
6	11234
7	172711
8	3112262
9	64422126
10	1506406702
11	39279802969
12	1130133725736
13	35566642690293
14	1215444767739120
15	44823725114186355
16	1774344335649148230
17	75042087586212893216
18	3377041177800135323864
19	161125608740713509132809
20	8124438293071792011560256

[1, 1, 2, 12, 86, 885, 11234, 172711, 3112262, 64422126, 1506406702, 39279802969, 1130133725736, 35566642690293, 1215444767739120, 44823725114186355, 1774344335649148230, 75042087586212893216, 3377041177800135323864, 161125608740713509132809, 8124438293071792011560256]

cp's OEIS Frontend

A305209 a(n) = [x^n] exp(Sum_{k>=1} (-1)^(k+1)x^k/(k(1 - n*x^k))).

Table of values

List of values

cp's OEIS Frontend

A305209 a(n) = [x^n] exp(Sum_{k>=1} (-1)^(k+1)*x^k/(k*(1 - n*x^k))).

Table of values

List of values

A305209 a(n) = [x^n] exp(Sum_{k>=1} (-1)^(k+1)x^k/(k(1 - n*x^k))).