A318125 - cp's OEIS frontend

A318125 a(n) = [x^n] exp(Sum_{k>=1} (-1)^(k+1)x^k(1 + (n - 3)x^k)/(k(1 - x^k)^4)).

n	a(n)
0	1
1	1
2	3
3	14
4	54
5	238
6	1026
7	4573
8	20404
9	91902
10	415953
11	1891908
12	8638846
13	39569655
14	181766878
15	836950153
16	3861927937
17	17853107055
18	82668539290
19	383360628369
20	1780126898575
21	8275908734103
22	38517137597486
23	179442212204245
24	836741558761935
25	3905012142470483

[1, 1, 3, 14, 54, 238, 1026, 4573, 20404, 91902, 415953, 1891908, 8638846, 39569655, 181766878, 836950153, 3861927937, 17853107055, 82668539290, 383360628369, 1780126898575, 8275908734103, 38517137597486, 179442212204245, 836741558761935, 3905012142470483]

cp's OEIS Frontend

A318125 a(n) = [x^n] exp(Sum_{k>=1} (-1)^(k+1)x^k(1 + (n - 3)x^k)/(k(1 - x^k)^4)).

Table of values

List of values

cp's OEIS Frontend

A318125 a(n) = [x^n] exp(Sum_{k>=1} (-1)^(k+1)*x^k*(1 + (n - 3)*x^k)/(k*(1 - x^k)^4)).

Table of values

List of values

A318125 a(n) = [x^n] exp(Sum_{k>=1} (-1)^(k+1)x^k(1 + (n - 3)x^k)/(k(1 - x^k)^4)).