A083660 - cp's OEIS frontend

A083660 Smallest nonnegative integer m such that the concatenation of the integers from n to 1 interspersed with those of m, in base 10, is prime.

n	a(n)
2	1
3	5
4	14
5	5
6	5
7	9
8	1
9	1
10	29
11	23
12	28
13	13
14	46
15	22
16	18
17	116
18	35
19	18
20	155
21	7
22	81
23	1
24	139
25	52
26	262
27	215
28	56
29	29
30	11
31	6
32	256
33	119
34	381
35	592
36	67
37	189
38	116
39	46
40	5
41	275
42	139
43	27
44	101
45	118
46	96
47	167
48	196
49	393
50	275
51	91
52	146
53	415
54	193
55	127
56	85
57	73
58	6
59	4
60	50
61	118
62	1046
63	362
64	5
65	431
66	248
67	180
68	82
69	230
70	125

[1, 5, 14, 5, 5, 9, 1, 1, 29, 23, 28, 13, 46, 22, 18, 116, 35, 18, 155, 7, 81, 1, 139, 52, 262, 215, 56, 29, 11, 6, 256, 119, 381, 592, 67, 189, 116, 46, 5, 275, 139, 27, 101, 118, 96, 167, 196, 393, 275, 91, 146, 415, 193, 127, 85, 73, 6, 4, 50, 118, 1046, 362, 5, 431, 248, 180, 82, 230, 125]

cp's OEIS Frontend

A083660 Smallest nonnegative integer m such that the concatenation of the integers from n to 1 interspersed with those of m, in base 10, is prime.

Table of values

List of values