A271606 - cp's OEIS frontend

A271606 Number of numbers k such that sigma_e(k) = n for some e > 0.

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

[1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 2, 1, 1, 1, 0, 1, 2, 0, 1, 1, 0, 0, 3, 0, 1, 0, 2, 0, 1, 2, 2, 1, 0, 0, 1, 0, 1, 1, 1, 0, 3, 0, 1, 0, 0, 0, 3, 0, 2, 0, 0, 0, 2, 0, 2, 1, 0, 0, 3, 0, 1, 1, 0, 1, 0, 0, 1, 0, 0, 0, 5, 1, 1, 0, 0, 0, 1, 0, 2, 0, 1, 0, 3, 1, 0, 0, 0, 0, 3, 2, 0, 1, 0, 0, 4, 0, 2, 0, 0]

cp's OEIS Frontend

A271606 Number of numbers k such that sigma_e(k) = n for some e > 0.

Table of values

List of values

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

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

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