A328948 - cp's OEIS frontend

A328948 Number of primes that are a concatenation of two positive integers whose product is n.

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

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

cp's OEIS Frontend

A328948 Number of primes that are a concatenation of two positive integers whose product is n.

Table of values

List of values

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

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

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