A066075 - cp's OEIS frontend

A066075 Number of solutions x to prime(n) = sigma(x) - 1, where prime(n) is the n-th prime.

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

[1, 1, 1, 1, 2, 1, 2, 1, 3, 1, 2, 1, 3, 1, 3, 2, 3, 1, 1, 5, 1, 2, 3, 3, 2, 1, 2, 2, 1, 2, 2, 2, 1, 2, 1, 2, 1, 1, 6, 1, 4, 2, 5, 1, 1, 1, 1, 3, 3, 1, 3, 7, 1, 6, 1, 2, 3, 2, 1, 1, 1, 3, 2, 4, 1, 1, 1, 1, 1, 1, 1, 9, 1, 1, 1, 6, 2, 1, 1, 1, 4, 1, 8, 4, 2, 2, 3, 1, 1, 1, 3, 9, 1, 2, 1, 10, 1, 2, 1, 1]

cp's OEIS Frontend

A066075 Number of solutions x to prime(n) = sigma(x) - 1, where prime(n) is the n-th prime.

Table of values

List of values

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

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

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