A201131 - cp's OEIS frontend

A201131 Least k such that (5^n - k)*5^n + 1 is a prime number.

n	a(n)
1	3
2	1
3	11
4	1
5	5
6	19
7	9
8	1
9	11
10	15
11	9
12	69
13	27
14	21
15	77
16	85
17	53
18	1
19	5
20	201
21	9
22	43
23	93
24	403
25	45
26	87
27	17
28	63
29	45
30	15
31	23
32	9
33	17
34	273
35	51
36	31
37	111
38	277
39	45
40	39
41	51
42	229
43	9
44	109
45	29
46	357
47	81
48	1
49	237
50	33
51	137
52	169
53	137
54	847
55	75
56	367
57	57
58	87
59	285
60	25
61	105
62	177
63	113
64	1

[3, 1, 11, 1, 5, 19, 9, 1, 11, 15, 9, 69, 27, 21, 77, 85, 53, 1, 5, 201, 9, 43, 93, 403, 45, 87, 17, 63, 45, 15, 23, 9, 17, 273, 51, 31, 111, 277, 45, 39, 51, 229, 9, 109, 29, 357, 81, 1, 237, 33, 137, 169, 137, 847, 75, 367, 57, 87, 285, 25, 105, 177, 113, 1]

cp's OEIS Frontend

A201131 Least k such that (5^n - k)*5^n + 1 is a prime number.

Table of values

List of values

n	a(n)
1	3
2	1
3	11
4	1
5	5
6	19
7	9
8	1
9	11
10	15
11	9
12	69
13	27
14	21
15	77
16	85
17	53
18	1
19	5
20	201
21	9
22	43
23	93
24	403
25	45
26	87
27	17
28	63
29	45
30	15
31	23
32	9
33	17
34	273
35	51
36	31
37	111
38	277
39	45
40	39
41	51
42	229
43	9
44	109
45	29
46	357
47	81
48	1
49	237
50	33
51	137
52	169
53	137
54	847
55	75
56	367
57	57
58	87
59	285
60	25
61	105
62	177
63	113
64	1

n	a(n)
1	3
2	1
3	11
4	1
5	5
6	19
7	9
8	1
9	11
10	15
11	9
12	69
13	27
14	21
15	77
16	85
17	53
18	1
19	5
20	201
21	9
22	43
23	93
24	403
25	45
26	87
27	17
28	63
29	45
30	15
31	23
32	9
33	17
34	273
35	51
36	31
37	111
38	277
39	45
40	39
41	51
42	229
43	9
44	109
45	29
46	357
47	81
48	1
49	237
50	33
51	137
52	169
53	137
54	847
55	75
56	367
57	57
58	87
59	285
60	25
61	105
62	177
63	113
64	1

n	a(n)
1	3
2	1
3	11
4	1
5	5
6	19
7	9
8	1
9	11
10	15
11	9
12	69
13	27
14	21
15	77
16	85
17	53
18	1
19	5
20	201
21	9
22	43
23	93
24	403
25	45
26	87
27	17
28	63
29	45
30	15
31	23
32	9
33	17
34	273
35	51
36	31
37	111
38	277
39	45
40	39
41	51
42	229
43	9
44	109
45	29
46	357
47	81
48	1
49	237
50	33
51	137
52	169
53	137
54	847
55	75
56	367
57	57
58	87
59	285
60	25
61	105
62	177
63	113
64	1