A240689 - cp's OEIS frontend

A240689 The number of values of the digit k for which prime(n)*10+k is prime.

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

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

cp's OEIS Frontend

A240689 The number of values of the digit k for which prime(n)*10+k is prime.

Table of values

List of values

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

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

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