A319858 - cp's OEIS frontend

A319858 a(n) is the number of values of m in the interval [2,10] such that the base-m expansion of n, interpreted as a base-10 number, yields a prime.

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

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

cp's OEIS Frontend

A319858 a(n) is the number of values of m in the interval [2,10] such that the base-m expansion of n, interpreted as a base-10 number, yields a prime.

Table of values

List of values

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

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

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