A345138 - cp's OEIS frontend

A345138 a(1) = 1, a(2) = 0; a(n+2) = Sum_{d|n, d < n} a(d).

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

[1, 0, 0, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 3, 1, 2, 2, 3, 1, 3, 1, 5, 2, 2, 1, 6, 2, 2, 2, 6, 1, 6, 1, 5, 2, 3, 3, 9, 1, 2, 2, 9, 1, 7, 1, 8, 4, 3, 1, 10, 2, 5, 3, 9, 1, 8, 3, 9, 2, 3, 1, 18, 1, 2, 4, 11, 3, 9, 1, 9, 3, 10, 1, 15, 1, 4, 4, 12, 3, 10, 1, 13, 4, 3, 1, 21, 4, 2, 3, 16, 1, 17, 3, 12, 2]

cp's OEIS Frontend

A345138 a(1) = 1, a(2) = 0; a(n+2) = Sum_{d|n, d < n} a(d).

Table of values

List of values

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

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

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