A345182 - cp's OEIS frontend

A345182 a(1) = 1, a(2) = 0; a(n) = Sum_{d|n, d < n} a(d).

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

[1, 0, 1, 1, 1, 2, 1, 2, 2, 2, 1, 5, 1, 2, 3, 4, 1, 6, 1, 5, 3, 2, 1, 12, 2, 2, 4, 5, 1, 10, 1, 8, 3, 2, 3, 18, 1, 2, 3, 12, 1, 10, 1, 5, 8, 2, 1, 28, 2, 6, 3, 5, 1, 16, 3, 12, 3, 2, 1, 31, 1, 2, 8, 16, 3, 10, 1, 5, 3, 10, 1, 50, 1, 2, 8, 5, 3, 10, 1, 28, 8, 2, 1, 31, 3, 2, 3, 12, 1, 36]

cp's OEIS Frontend

A345182 a(1) = 1, a(2) = 0; a(n) = Sum_{d|n, d < n} a(d).

Table of values

List of values

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

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

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