A074813 - cp's OEIS frontend

A074813 Number of primes between n and R(n) (inclusive), where R(n) (A004086) is the digit reversal of n.

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

[0, 1, 1, 0, 1, 0, 1, 0, 0, 4, 1, 3, 6, 7, 9, 12, 14, 15, 17, 8, 3, 0, 3, 4, 6, 9, 11, 13, 15, 9, 6, 3, 0, 3, 5, 7, 10, 11, 12, 10, 7, 4, 3, 0, 2, 4, 7, 8, 9, 13, 9, 6, 5, 2, 0, 2, 5, 7, 8, 14, 12, 9, 7, 4, 2, 0, 3, 4, 5, 16, 14, 11, 10, 7, 5, 3, 0, 2, 4, 18, 15, 13, 11, 8, 7, 4, 2, 0, 2, 20, 17]

cp's OEIS Frontend

A074813 Number of primes between n and R(n) (inclusive), where R(n) (A004086) is the digit reversal of n.

Table of values

List of values

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

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

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