A277915 - cp's OEIS frontend

A277915 A(n,k) is the n-th number m such that a nontrivial prime(k)-th root of unity modulo m exists; square array A(n,k), n>=1, k>=1, read by antidiagonals.

n	a(n)
1	8
2	7
3	12
4	11
5	9
6	15
7	29
8	22
9	13
10	16
11	23
12	43
13	25
14	14
15	20
16	53
17	46
18	49
19	31
20	18
21	21
22	103
23	79
24	67
25	58
26	33
27	19
28	24
29	191
30	137
31	106
32	69
33	71
34	41
35	21
36	28
37	47
38	229
39	206
40	131
41	89
42	86
43	44
44	26
45	30
46	59
47	94
48	361
49	239
50	157
51	92
52	87
53	50
54	27
55	32
56	311
57	118
58	139
59	382
60	274
61	158
62	115
63	98
64	55
65	28
66	33

[8, 7, 12, 11, 9, 15, 29, 22, 13, 16, 23, 43, 25, 14, 20, 53, 46, 49, 31, 18, 21, 103, 79, 67, 58, 33, 19, 24, 191, 137, 106, 69, 71, 41, 21, 28, 47, 229, 206, 131, 89, 86, 44, 26, 30, 59, 94, 361, 239, 157, 92, 87, 50, 27, 32, 311, 118, 139, 382, 274, 158, 115, 98, 55, 28, 33]

cp's OEIS Frontend

A277915 A(n,k) is the n-th number m such that a nontrivial prime(k)-th root of unity modulo m exists; square array A(n,k), n>=1, k>=1, read by antidiagonals.

Table of values

List of values

n	a(n)
1	8
2	7
3	12
4	11
5	9
6	15
7	29
8	22
9	13
10	16
11	23
12	43
13	25
14	14
15	20
16	53
17	46
18	49
19	31
20	18
21	21
22	103
23	79
24	67
25	58
26	33
27	19
28	24
29	191
30	137
31	106
32	69
33	71
34	41
35	21
36	28
37	47
38	229
39	206
40	131
41	89
42	86
43	44
44	26
45	30
46	59
47	94
48	361
49	239
50	157
51	92
52	87
53	50
54	27
55	32
56	311
57	118
58	139
59	382
60	274
61	158
62	115
63	98
64	55
65	28
66	33

n	a(n)
1	8
2	7
3	12
4	11
5	9
6	15
7	29
8	22
9	13
10	16
11	23
12	43
13	25
14	14
15	20
16	53
17	46
18	49
19	31
20	18
21	21
22	103
23	79
24	67
25	58
26	33
27	19
28	24
29	191
30	137
31	106
32	69
33	71
34	41
35	21
36	28
37	47
38	229
39	206
40	131
41	89
42	86
43	44
44	26
45	30
46	59
47	94
48	361
49	239
50	157
51	92
52	87
53	50
54	27
55	32
56	311
57	118
58	139
59	382
60	274
61	158
62	115
63	98
64	55
65	28
66	33

n	a(n)
1	8
2	7
3	12
4	11
5	9
6	15
7	29
8	22
9	13
10	16
11	23
12	43
13	25
14	14
15	20
16	53
17	46
18	49
19	31
20	18
21	21
22	103
23	79
24	67
25	58
26	33
27	19
28	24
29	191
30	137
31	106
32	69
33	71
34	41
35	21
36	28
37	47
38	229
39	206
40	131
41	89
42	86
43	44
44	26
45	30
46	59
47	94
48	361
49	239
50	157
51	92
52	87
53	50
54	27
55	32
56	311
57	118
58	139
59	382
60	274
61	158
62	115
63	98
64	55
65	28
66	33