A137779 - cp's OEIS frontend

A137779 Number of bases (numbering systems, including unary) in which the n-th prime is a palindrome having at least two digits.

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

[1, 2, 3, 3, 2, 3, 4, 2, 3, 3, 4, 3, 3, 3, 2, 2, 3, 3, 4, 3, 4, 2, 3, 3, 3, 3, 2, 4, 4, 3, 4, 3, 2, 2, 2, 4, 4, 2, 2, 4, 2, 4, 5, 3, 4, 3, 4, 2, 4, 3, 3, 3, 4, 3, 6, 2, 2, 4, 4, 3, 2, 2, 4, 2, 5, 2, 3, 5, 2, 3, 5, 2, 2, 6, 5, 3, 2, 3, 4, 4, 4, 5, 3, 4, 2, 5, 3, 4, 4, 4, 3, 3, 4, 2, 3, 3, 3, 4, 4]

cp's OEIS Frontend

A137779 Number of bases (numbering systems, including unary) in which the n-th prime is a palindrome having at least two digits.

Table of values

List of values

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

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

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