A305610 - cp's OEIS frontend

A305610 a(n) = (-1)^(n-1) + Sum_{d|n, d>1} binomial(a(n/d) + d - 1, d).

n	a(n)
1	1
2	0
3	2
4	0
5	2
6	3
7	2
8	0
9	6
10	3
11	2
12	11
13	2
14	3
15	12
16	0
17	2
18	38
19	2
20	11
21	14
22	3
23	2
24	90
25	8
26	3
27	68
28	11
29	2
30	127
31	2
32	0
33	18
34	3
35	16
36	1194
37	2
38	3
39	20
40	90
41	2
42	173
43	2
44	11
45	644
46	3
47	2
48	5158
49	10
50	68
51	24
52	11
53	2
54	12762
55	20
56	90
57	26
58	3
59	2
60	12910
61	2
62	3
63	1386
64	0
65	22
66	289
67	2
68	11
69	30
70	219
71	2

[1, 0, 2, 0, 2, 3, 2, 0, 6, 3, 2, 11, 2, 3, 12, 0, 2, 38, 2, 11, 14, 3, 2, 90, 8, 3, 68, 11, 2, 127, 2, 0, 18, 3, 16, 1194, 2, 3, 20, 90, 2, 173, 2, 11, 644, 3, 2, 5158, 10, 68, 24, 11, 2, 12762, 20, 90, 26, 3, 2, 12910, 2, 3, 1386, 0, 22, 289, 2, 11, 30, 219, 2]

cp's OEIS Frontend

A305610 a(n) = (-1)^(n-1) + Sum_{d|n, d>1} binomial(a(n/d) + d - 1, d).

Table of values

List of values