A304907 - cp's OEIS frontend

A304907 Expansion of x * (d/dx) 1/(1 - Sum_{k>=1} x^k/(1 + x^k)).

n	a(n)
0	0
1	1
2	2
3	9
4	16
5	35
6	84
7	161
8	312
9	639
10	1240
11	2354
12	4536
13	8593
14	16128
15	30360
16	56672
17	105213
18	195174
19	360582
20	664040
21	1220730
22	2238324
23	4095035
24	7479552
25	13636750
26	24821108
27	45114813
28	81887008
29	148438211
30	268763160
31	486082263
32	878200416
33	1585098372
34	2858378368
35	5149986275

[0, 1, 2, 9, 16, 35, 84, 161, 312, 639, 1240, 2354, 4536, 8593, 16128, 30360, 56672, 105213, 195174, 360582, 664040, 1220730, 2238324, 4095035, 7479552, 13636750, 24821108, 45114813, 81887008, 148438211, 268763160, 486082263, 878200416, 1585098372, 2858378368, 5149986275]

cp's OEIS Frontend

A304907 Expansion of x * (d/dx) 1/(1 - Sum_{k>=1} x^k/(1 + x^k)).

Table of values

List of values