A048138 - cp's OEIS frontend

A048138 a(n) = number of m such that sum of proper divisors of m (A001065(m)) is n.

n	a(n)
2	0
3	1
4	1
5	0
6	2
7	1
8	2
9	1
10	1
11	1
12	1
13	2
14	2
15	2
16	2
17	2
18	1
19	2
20	2
21	3
22	2
23	2
24	1
25	3
26	1
27	2
28	1
29	2
30	1
31	5
32	2
33	3
34	1
35	3
36	1
37	4
38	1
39	1
40	3
41	4
42	2
43	5
44	2
45	3
46	2
47	3
48	1
49	6
50	2
51	4
52	0
53	3
54	2
55	6
56	1
57	5
58	1
59	3
60	1
61	6
62	2
63	3
64	3
65	6
66	1
67	6
68	1
69	2
70	1
71	5
72	1
73	8
74	3
75	4
76	3
77	5
78	1
79	7
80	1
81	6
82	1
83	4
84	1
85	8
86	1
87	5
88	0
89	5
90	2
91	9
92	2
93	4
94	1
95	4
96	0
97	9
98	1
99	3
100	2
101	6
102	1
103	8
104	2
105	7
106	4

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

cp's OEIS Frontend

A048138 a(n) = number of m such that sum of proper divisors of m (A001065(m)) is n.

Table of values

List of values

n	a(n)
2	0
3	1
4	1
5	0
6	2
7	1
8	2
9	1
10	1
11	1
12	1
13	2
14	2
15	2
16	2
17	2
18	1
19	2
20	2
21	3
22	2
23	2
24	1
25	3
26	1
27	2
28	1
29	2
30	1
31	5
32	2
33	3
34	1
35	3
36	1
37	4
38	1
39	1
40	3
41	4
42	2
43	5
44	2
45	3
46	2
47	3
48	1
49	6
50	2
51	4
52	0
53	3
54	2
55	6
56	1
57	5
58	1
59	3
60	1
61	6
62	2
63	3
64	3
65	6
66	1
67	6
68	1
69	2
70	1
71	5
72	1
73	8
74	3
75	4
76	3
77	5
78	1
79	7
80	1
81	6
82	1
83	4
84	1
85	8
86	1
87	5
88	0
89	5
90	2
91	9
92	2
93	4
94	1
95	4
96	0
97	9
98	1
99	3
100	2
101	6
102	1
103	8
104	2
105	7
106	4

n	a(n)
2	0
3	1
4	1
5	0
6	2
7	1
8	2
9	1
10	1
11	1
12	1
13	2
14	2
15	2
16	2
17	2
18	1
19	2
20	2
21	3
22	2
23	2
24	1
25	3
26	1
27	2
28	1
29	2
30	1
31	5
32	2
33	3
34	1
35	3
36	1
37	4
38	1
39	1
40	3
41	4
42	2
43	5
44	2
45	3
46	2
47	3
48	1
49	6
50	2
51	4
52	0
53	3
54	2
55	6
56	1
57	5
58	1
59	3
60	1
61	6
62	2
63	3
64	3
65	6
66	1
67	6
68	1
69	2
70	1
71	5
72	1
73	8
74	3
75	4
76	3
77	5
78	1
79	7
80	1
81	6
82	1
83	4
84	1
85	8
86	1
87	5
88	0
89	5
90	2
91	9
92	2
93	4
94	1
95	4
96	0
97	9
98	1
99	3
100	2
101	6
102	1
103	8
104	2
105	7
106	4

n	a(n)
2	0
3	1
4	1
5	0
6	2
7	1
8	2
9	1
10	1
11	1
12	1
13	2
14	2
15	2
16	2
17	2
18	1
19	2
20	2
21	3
22	2
23	2
24	1
25	3
26	1
27	2
28	1
29	2
30	1
31	5
32	2
33	3
34	1
35	3
36	1
37	4
38	1
39	1
40	3
41	4
42	2
43	5
44	2
45	3
46	2
47	3
48	1
49	6
50	2
51	4
52	0
53	3
54	2
55	6
56	1
57	5
58	1
59	3
60	1
61	6
62	2
63	3
64	3
65	6
66	1
67	6
68	1
69	2
70	1
71	5
72	1
73	8
74	3
75	4
76	3
77	5
78	1
79	7
80	1
81	6
82	1
83	4
84	1
85	8
86	1
87	5
88	0
89	5
90	2
91	9
92	2
93	4
94	1
95	4
96	0
97	9
98	1
99	3
100	2
101	6
102	1
103	8
104	2
105	7
106	4