A088606 - cp's OEIS frontend

A088606 Smallest number k such that concatenation of k and prime(n) is a prime, or 0 if no other number exists. a(1) = a(3) = 0.

n	a(n)
1	0
2	1
3	0
4	1
5	2
6	1
7	3
8	4
9	2
10	2
11	1
12	1
13	2
14	4
15	3
16	3
17	3
18	4
19	1
20	2
21	1
22	1
23	2
24	3
25	1
26	5
27	1
28	5
29	1
30	2
31	4
32	2
33	2
34	4
35	11
36	1
37	4
38	1
39	3
40	6
41	2
42	1
43	3
44	1
45	5
46	6
47	4
48	1
49	5
50	1
51	5
52	2
53	4
54	2
55	3
56	6
57	2
58	3
59	1
60	2
61	1
62	2
63	1
64	2
65	3
66	6
67	3
68	4
69	2
70	4
71	6
72	3
73	1
74	1
75	6
76	2
77	2
78	4
79	12
80	1
81	5
82	4
83	5
84	1
85	1
86	5
87	3
88	3
89	3
90	3
91	2
92	5
93	1
94	3
95	1
96	2
97	17
98	2
99	1
100	3
101	3
102	2
103	5
104	5

[0, 1, 0, 1, 2, 1, 3, 4, 2, 2, 1, 1, 2, 4, 3, 3, 3, 4, 1, 2, 1, 1, 2, 3, 1, 5, 1, 5, 1, 2, 4, 2, 2, 4, 11, 1, 4, 1, 3, 6, 2, 1, 3, 1, 5, 6, 4, 1, 5, 1, 5, 2, 4, 2, 3, 6, 2, 3, 1, 2, 1, 2, 1, 2, 3, 6, 3, 4, 2, 4, 6, 3, 1, 1, 6, 2, 2, 4, 12, 1, 5, 4, 5, 1, 1, 5, 3, 3, 3, 3, 2, 5, 1, 3, 1, 2, 17, 2, 1, 3, 3, 2, 5, 5]

cp's OEIS Frontend

A088606 Smallest number k such that concatenation of k and prime(n) is a prime, or 0 if no other number exists. a(1) = a(3) = 0.

Table of values

List of values

n	a(n)
1	0
2	1
3	0
4	1
5	2
6	1
7	3
8	4
9	2
10	2
11	1
12	1
13	2
14	4
15	3
16	3
17	3
18	4
19	1
20	2
21	1
22	1
23	2
24	3
25	1
26	5
27	1
28	5
29	1
30	2
31	4
32	2
33	2
34	4
35	11
36	1
37	4
38	1
39	3
40	6
41	2
42	1
43	3
44	1
45	5
46	6
47	4
48	1
49	5
50	1
51	5
52	2
53	4
54	2
55	3
56	6
57	2
58	3
59	1
60	2
61	1
62	2
63	1
64	2
65	3
66	6
67	3
68	4
69	2
70	4
71	6
72	3
73	1
74	1
75	6
76	2
77	2
78	4
79	12
80	1
81	5
82	4
83	5
84	1
85	1
86	5
87	3
88	3
89	3
90	3
91	2
92	5
93	1
94	3
95	1
96	2
97	17
98	2
99	1
100	3
101	3
102	2
103	5
104	5

n	a(n)
1	0
2	1
3	0
4	1
5	2
6	1
7	3
8	4
9	2
10	2
11	1
12	1
13	2
14	4
15	3
16	3
17	3
18	4
19	1
20	2
21	1
22	1
23	2
24	3
25	1
26	5
27	1
28	5
29	1
30	2
31	4
32	2
33	2
34	4
35	11
36	1
37	4
38	1
39	3
40	6
41	2
42	1
43	3
44	1
45	5
46	6
47	4
48	1
49	5
50	1
51	5
52	2
53	4
54	2
55	3
56	6
57	2
58	3
59	1
60	2
61	1
62	2
63	1
64	2
65	3
66	6
67	3
68	4
69	2
70	4
71	6
72	3
73	1
74	1
75	6
76	2
77	2
78	4
79	12
80	1
81	5
82	4
83	5
84	1
85	1
86	5
87	3
88	3
89	3
90	3
91	2
92	5
93	1
94	3
95	1
96	2
97	17
98	2
99	1
100	3
101	3
102	2
103	5
104	5

n	a(n)
1	0
2	1
3	0
4	1
5	2
6	1
7	3
8	4
9	2
10	2
11	1
12	1
13	2
14	4
15	3
16	3
17	3
18	4
19	1
20	2
21	1
22	1
23	2
24	3
25	1
26	5
27	1
28	5
29	1
30	2
31	4
32	2
33	2
34	4
35	11
36	1
37	4
38	1
39	3
40	6
41	2
42	1
43	3
44	1
45	5
46	6
47	4
48	1
49	5
50	1
51	5
52	2
53	4
54	2
55	3
56	6
57	2
58	3
59	1
60	2
61	1
62	2
63	1
64	2
65	3
66	6
67	3
68	4
69	2
70	4
71	6
72	3
73	1
74	1
75	6
76	2
77	2
78	4
79	12
80	1
81	5
82	4
83	5
84	1
85	1
86	5
87	3
88	3
89	3
90	3
91	2
92	5
93	1
94	3
95	1
96	2
97	17
98	2
99	1
100	3
101	3
102	2
103	5
104	5