A328903 - cp's OEIS frontend

A328903 Number of primes that are a concatenation of two positive integers whose sum is n.

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

[0, 0, 1, 0, 2, 2, 0, 2, 3, 0, 3, 4, 0, 3, 5, 0, 4, 2, 0, 6, 5, 0, 4, 5, 0, 6, 7, 0, 6, 9, 0, 6, 8, 0, 9, 8, 0, 7, 7, 0, 9, 10, 0, 11, 2, 0, 12, 12, 0, 10, 11, 0, 11, 14, 0, 3, 10, 0, 10, 12, 0, 16, 12, 0, 16, 14, 0, 14, 19, 0, 13, 17, 0, 12, 16, 0, 15, 2, 0]

cp's OEIS Frontend

A328903 Number of primes that are a concatenation of two positive integers whose sum is n.

Table of values

List of values

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

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

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