A318124 - cp's OEIS frontend

A318124 a(n) = [x^n] exp(Sum_{k>=1} (-1)^(k+1)x^k(1 + (n - 3)x^k)/(k(1 - x^k)^3)).

n	a(n)
0	1
1	1
2	2
3	9
4	31
5	127
6	494
7	1994
8	8040
9	32741
10	133855
11	549775
12	2266756
13	9372300
14	38862245
15	161500403
16	672538548
17	2805669061
18	11723319333
19	49055511943
20	205534846202
21	862167483656
22	3620429584614
23	15217780335870
24	64022149180478
25	269566679312520
26	1135878674712355

[1, 1, 2, 9, 31, 127, 494, 1994, 8040, 32741, 133855, 549775, 2266756, 9372300, 38862245, 161500403, 672538548, 2805669061, 11723319333, 49055511943, 205534846202, 862167483656, 3620429584614, 15217780335870, 64022149180478, 269566679312520, 1135878674712355]

cp's OEIS Frontend

A318124 a(n) = [x^n] exp(Sum_{k>=1} (-1)^(k+1)x^k(1 + (n - 3)x^k)/(k(1 - x^k)^3)).

Table of values

List of values

cp's OEIS Frontend

A318124 a(n) = [x^n] exp(Sum_{k>=1} (-1)^(k+1)*x^k*(1 + (n - 3)*x^k)/(k*(1 - x^k)^3)).

Table of values

List of values

A318124 a(n) = [x^n] exp(Sum_{k>=1} (-1)^(k+1)x^k(1 + (n - 3)x^k)/(k(1 - x^k)^3)).