A055224 - cp's OEIS frontend

A055224 a(1) = 1, a(n) = number of a(k) with 1 <= k <= n-1 such that a(k) divides a(n-k).

n	a(n)
1	1
2	1
3	2
4	2
5	2
6	3
7	4
8	5
9	4
10	4
11	3
12	5
13	4
14	5
15	3
16	6
17	7
18	4
19	5
20	8
21	6
22	9
23	6
24	5
25	6
26	9
27	10
28	8
29	5
30	6
31	10
32	9
33	8
34	6
35	6
36	10
37	11
38	12
39	9
40	8
41	13
42	5
43	11
44	8
45	8
46	11
47	6
48	15
49	7
50	14
51	11
52	5
53	13
54	13
55	10
56	10
57	5
58	13
59	8
60	14
61	10
62	7
63	12
64	13
65	13
66	12
67	8
68	11
69	12
70	9
71	12
72	14
73	12
74	8
75	8
76	15
77	15
78	12
79	14
80	12
81	14
82	15
83	13
84	19
85	15
86	12

[1, 1, 2, 2, 2, 3, 4, 5, 4, 4, 3, 5, 4, 5, 3, 6, 7, 4, 5, 8, 6, 9, 6, 5, 6, 9, 10, 8, 5, 6, 10, 9, 8, 6, 6, 10, 11, 12, 9, 8, 13, 5, 11, 8, 8, 11, 6, 15, 7, 14, 11, 5, 13, 13, 10, 10, 5, 13, 8, 14, 10, 7, 12, 13, 13, 12, 8, 11, 12, 9, 12, 14, 12, 8, 8, 15, 15, 12, 14, 12, 14, 15, 13, 19, 15, 12]

cp's OEIS Frontend

A055224 a(1) = 1, a(n) = number of a(k) with 1 <= k <= n-1 such that a(k) divides a(n-k).

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	2
5	2
6	3
7	4
8	5
9	4
10	4
11	3
12	5
13	4
14	5
15	3
16	6
17	7
18	4
19	5
20	8
21	6
22	9
23	6
24	5
25	6
26	9
27	10
28	8
29	5
30	6
31	10
32	9
33	8
34	6
35	6
36	10
37	11
38	12
39	9
40	8
41	13
42	5
43	11
44	8
45	8
46	11
47	6
48	15
49	7
50	14
51	11
52	5
53	13
54	13
55	10
56	10
57	5
58	13
59	8
60	14
61	10
62	7
63	12
64	13
65	13
66	12
67	8
68	11
69	12
70	9
71	12
72	14
73	12
74	8
75	8
76	15
77	15
78	12
79	14
80	12
81	14
82	15
83	13
84	19
85	15
86	12

n	a(n)
1	1
2	1
3	2
4	2
5	2
6	3
7	4
8	5
9	4
10	4
11	3
12	5
13	4
14	5
15	3
16	6
17	7
18	4
19	5
20	8
21	6
22	9
23	6
24	5
25	6
26	9
27	10
28	8
29	5
30	6
31	10
32	9
33	8
34	6
35	6
36	10
37	11
38	12
39	9
40	8
41	13
42	5
43	11
44	8
45	8
46	11
47	6
48	15
49	7
50	14
51	11
52	5
53	13
54	13
55	10
56	10
57	5
58	13
59	8
60	14
61	10
62	7
63	12
64	13
65	13
66	12
67	8
68	11
69	12
70	9
71	12
72	14
73	12
74	8
75	8
76	15
77	15
78	12
79	14
80	12
81	14
82	15
83	13
84	19
85	15
86	12

n	a(n)
1	1
2	1
3	2
4	2
5	2
6	3
7	4
8	5
9	4
10	4
11	3
12	5
13	4
14	5
15	3
16	6
17	7
18	4
19	5
20	8
21	6
22	9
23	6
24	5
25	6
26	9
27	10
28	8
29	5
30	6
31	10
32	9
33	8
34	6
35	6
36	10
37	11
38	12
39	9
40	8
41	13
42	5
43	11
44	8
45	8
46	11
47	6
48	15
49	7
50	14
51	11
52	5
53	13
54	13
55	10
56	10
57	5
58	13
59	8
60	14
61	10
62	7
63	12
64	13
65	13
66	12
67	8
68	11
69	12
70	9
71	12
72	14
73	12
74	8
75	8
76	15
77	15
78	12
79	14
80	12
81	14
82	15
83	13
84	19
85	15
86	12