A167764 - cp's OEIS frontend

A167764 a(n) is the index k of k-th prime prime(k) in the smallest concatenation "2 3 ... prime(k)" where prime(n+1) is a factor.

n	a(n)
1	10
2	3
3	5
4	7
5	18
6	11
7	58
8	2
9	6
10	28
11	177
12	85
13	47
14	3
15	191
16	35
17	9
18	12
19	40
20	108
21	40
22	60
23	69
24	43
25	84
26	314
27	29
28	77
29	231
30	59
31	76
32	49
33	86
34	289
35	5
36	51
37	71
38	43
39	269
40	101
41	53
42	78
43	42
44	46
45	958
46	22
47	5
48	101
49	151
50	65
51	198
52	80
53	22
54	428
55	363
56	172
57	686
58	494
59	399
60	11
61	96
62	425
63	277
64	525

[10, 3, 5, 7, 18, 11, 58, 2, 6, 28, 177, 85, 47, 3, 191, 35, 9, 12, 40, 108, 40, 60, 69, 43, 84, 314, 29, 77, 231, 59, 76, 49, 86, 289, 5, 51, 71, 43, 269, 101, 53, 78, 42, 46, 958, 22, 5, 101, 151, 65, 198, 80, 22, 428, 363, 172, 686, 494, 399, 11, 96, 425, 277, 525]

cp's OEIS Frontend

A167764 a(n) is the index k of k-th prime prime(k) in the smallest concatenation "2 3 ... prime(k)" where prime(n+1) is a factor.

Table of values

List of values

n	a(n)
1	10
2	3
3	5
4	7
5	18
6	11
7	58
8	2
9	6
10	28
11	177
12	85
13	47
14	3
15	191
16	35
17	9
18	12
19	40
20	108
21	40
22	60
23	69
24	43
25	84
26	314
27	29
28	77
29	231
30	59
31	76
32	49
33	86
34	289
35	5
36	51
37	71
38	43
39	269
40	101
41	53
42	78
43	42
44	46
45	958
46	22
47	5
48	101
49	151
50	65
51	198
52	80
53	22
54	428
55	363
56	172
57	686
58	494
59	399
60	11
61	96
62	425
63	277
64	525

n	a(n)
1	10
2	3
3	5
4	7
5	18
6	11
7	58
8	2
9	6
10	28
11	177
12	85
13	47
14	3
15	191
16	35
17	9
18	12
19	40
20	108
21	40
22	60
23	69
24	43
25	84
26	314
27	29
28	77
29	231
30	59
31	76
32	49
33	86
34	289
35	5
36	51
37	71
38	43
39	269
40	101
41	53
42	78
43	42
44	46
45	958
46	22
47	5
48	101
49	151
50	65
51	198
52	80
53	22
54	428
55	363
56	172
57	686
58	494
59	399
60	11
61	96
62	425
63	277
64	525

n	a(n)
1	10
2	3
3	5
4	7
5	18
6	11
7	58
8	2
9	6
10	28
11	177
12	85
13	47
14	3
15	191
16	35
17	9
18	12
19	40
20	108
21	40
22	60
23	69
24	43
25	84
26	314
27	29
28	77
29	231
30	59
31	76
32	49
33	86
34	289
35	5
36	51
37	71
38	43
39	269
40	101
41	53
42	78
43	42
44	46
45	958
46	22
47	5
48	101
49	151
50	65
51	198
52	80
53	22
54	428
55	363
56	172
57	686
58	494
59	399
60	11
61	96
62	425
63	277
64	525