A331971 - cp's OEIS frontend

A331971 a(n) is the number of values of m such that the sum of proper bi-unitary divisors of m (A331970) is n.

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

[0, 0, 0, 0, 1, 1, 2, 1, 2, 2, 2, 2, 2, 2, 2, 3, 1, 2, 1, 3, 2, 3, 1, 3, 1, 3, 2, 4, 1, 6, 1, 4, 2, 4, 2, 5, 0, 3, 1, 4, 2, 5, 1, 4, 2, 4, 1, 6, 2, 5, 2, 5, 2, 8, 1, 6, 1, 4, 2, 7, 1, 5, 3, 5, 2, 8, 0, 5, 1, 6, 1, 8, 2, 5, 3, 6, 3, 9, 0, 6, 2, 5, 1, 9, 1, 7, 1]

cp's OEIS Frontend

A331971 a(n) is the number of values of m such that the sum of proper bi-unitary divisors of m (A331970) is n.

Table of values

List of values

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

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

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