A345137 - cp's OEIS frontend

A345137 a(1) = a(2) = 1; a(n+2) = Sum_{d|n, d < n} a(d).

n	a(n)
1	1
2	1
3	0
4	1
5	1
6	2
7	1
8	2
9	1
10	3
11	1
12	3
13	1
14	5
15	1
16	3
17	2
18	5
19	1
20	5
21	1
22	7
23	2
24	3
25	1
26	10
27	2
28	3
29	2
30	9
31	1
32	9
33	1
34	8
35	2
36	4
37	3
38	14
39	1
40	3
41	2
42	14
43	1
44	11
45	1
46	11
47	4
48	4
49	1
50	16
51	2
52	7
53	3
54	14
55	1
56	12
57	3
58	14
59	2
60	4
61	1
62	27
63	1
64	3
65	4
66	17
67	3
68	13
69	1
70	13
71	3
72	14
73	1
74	23
75	1
76	5
77	4
78	18
79	3
80	16
81	1
82	20
83	4
84	4
85	1
86	32
87	4
88	3
89	3
90	24
91	1
92	25
93	3
94	16
95	2

[1, 1, 0, 1, 1, 2, 1, 2, 1, 3, 1, 3, 1, 5, 1, 3, 2, 5, 1, 5, 1, 7, 2, 3, 1, 10, 2, 3, 2, 9, 1, 9, 1, 8, 2, 4, 3, 14, 1, 3, 2, 14, 1, 11, 1, 11, 4, 4, 1, 16, 2, 7, 3, 14, 1, 12, 3, 14, 2, 4, 1, 27, 1, 3, 4, 17, 3, 13, 1, 13, 3, 14, 1, 23, 1, 5, 4, 18, 3, 16, 1, 20, 4, 4, 1, 32, 4, 3, 3, 24, 1, 25, 3, 16, 2]

cp's OEIS Frontend

A345137 a(1) = a(2) = 1; a(n+2) = Sum_{d|n, d < n} a(d).

Table of values

List of values

n	a(n)
1	1
2	1
3	0
4	1
5	1
6	2
7	1
8	2
9	1
10	3
11	1
12	3
13	1
14	5
15	1
16	3
17	2
18	5
19	1
20	5
21	1
22	7
23	2
24	3
25	1
26	10
27	2
28	3
29	2
30	9
31	1
32	9
33	1
34	8
35	2
36	4
37	3
38	14
39	1
40	3
41	2
42	14
43	1
44	11
45	1
46	11
47	4
48	4
49	1
50	16
51	2
52	7
53	3
54	14
55	1
56	12
57	3
58	14
59	2
60	4
61	1
62	27
63	1
64	3
65	4
66	17
67	3
68	13
69	1
70	13
71	3
72	14
73	1
74	23
75	1
76	5
77	4
78	18
79	3
80	16
81	1
82	20
83	4
84	4
85	1
86	32
87	4
88	3
89	3
90	24
91	1
92	25
93	3
94	16
95	2

n	a(n)
1	1
2	1
3	0
4	1
5	1
6	2
7	1
8	2
9	1
10	3
11	1
12	3
13	1
14	5
15	1
16	3
17	2
18	5
19	1
20	5
21	1
22	7
23	2
24	3
25	1
26	10
27	2
28	3
29	2
30	9
31	1
32	9
33	1
34	8
35	2
36	4
37	3
38	14
39	1
40	3
41	2
42	14
43	1
44	11
45	1
46	11
47	4
48	4
49	1
50	16
51	2
52	7
53	3
54	14
55	1
56	12
57	3
58	14
59	2
60	4
61	1
62	27
63	1
64	3
65	4
66	17
67	3
68	13
69	1
70	13
71	3
72	14
73	1
74	23
75	1
76	5
77	4
78	18
79	3
80	16
81	1
82	20
83	4
84	4
85	1
86	32
87	4
88	3
89	3
90	24
91	1
92	25
93	3
94	16
95	2

n	a(n)
1	1
2	1
3	0
4	1
5	1
6	2
7	1
8	2
9	1
10	3
11	1
12	3
13	1
14	5
15	1
16	3
17	2
18	5
19	1
20	5
21	1
22	7
23	2
24	3
25	1
26	10
27	2
28	3
29	2
30	9
31	1
32	9
33	1
34	8
35	2
36	4
37	3
38	14
39	1
40	3
41	2
42	14
43	1
44	11
45	1
46	11
47	4
48	4
49	1
50	16
51	2
52	7
53	3
54	14
55	1
56	12
57	3
58	14
59	2
60	4
61	1
62	27
63	1
64	3
65	4
66	17
67	3
68	13
69	1
70	13
71	3
72	14
73	1
74	23
75	1
76	5
77	4
78	18
79	3
80	16
81	1
82	20
83	4
84	4
85	1
86	32
87	4
88	3
89	3
90	24
91	1
92	25
93	3
94	16
95	2