A241019 - cp's OEIS frontend

A241019 a(n) is the smallest j such that the n-digit number consisting of a 1 in position j and 3's in the other n-1 positions is a prime, or 0 if no such prime exists.

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

[1, 2, 3, 2, 2, 4, 2, 6, 5, 5, 5, 0, 3, 8, 1, 11, 7, 6, 4, 5, 11, 5, 0, 0, 9, 11, 0, 5, 5, 0, 4, 5, 17, 19, 19, 6, 0, 3, 9, 35, 1, 27, 24, 32, 0, 36, 14, 11, 34, 14, 22, 0, 17, 53, 0, 47, 11, 0, 16, 3, 0, 15, 0, 39, 22, 40, 27, 39, 0, 19, 2, 19, 48, 2, 43, 19]

cp's OEIS Frontend

A241019 a(n) is the smallest j such that the n-digit number consisting of a 1 in position j and 3's in the other n-1 positions is a prime, or 0 if no such prime exists.

Table of values

List of values

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

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

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