A164988 - cp's OEIS frontend

A164988 Number of ways to select disjoint subsets out of {1..n} such that their (sorted) element sums give the list of divisors of n.

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	3
8	2
9	3
10	3
11	7
12	2
13	10
14	9
15	7
16	9
17	21
18	8
19	29
20	12
21	31
22	67
23	56
24	11
25	79
26	167
27	105
28	85
29	137
30	37
31	181
32	248
33	346
34	893
35	299
36	106
37	404
38	1974
39	993
40	338
41	669
42	724
43	853
44	3335
45	1068
46	8757
47	1371
48	852
49	2422
50	9157
51	7124
52	17168
53	2702
54	11606
55	6390
56	10782
57	17681
58	68538

[1, 1, 1, 1, 2, 1, 3, 2, 3, 3, 7, 2, 10, 9, 7, 9, 21, 8, 29, 12, 31, 67, 56, 11, 79, 167, 105, 85, 137, 37, 181, 248, 346, 893, 299, 106, 404, 1974, 993, 338, 669, 724, 853, 3335, 1068, 8757, 1371, 852, 2422, 9157, 7124, 17168, 2702, 11606, 6390, 10782, 17681, 68538]

cp's OEIS Frontend

A164988 Number of ways to select disjoint subsets out of {1..n} such that their (sorted) element sums give the list of divisors of n.

Table of values

List of values