A330541 - cp's OEIS frontend

A330541 Triangle read by rows: T(n,k) = gcd {x^n - x^k : x is an integer}, 0 < k < n.

n	a(n)
2	2
3	6
4	2
5	2
6	12
7	2
8	30
9	2
10	24
11	2
12	2
13	60
14	2
15	24
16	2
17	42
18	2
19	120
20	2
21	24
22	2
23	2
24	252
25	2
26	240
27	2
28	24
29	2
30	30
31	2
32	504
33	2
34	240
35	2
36	24
37	2
38	2
39	60
40	2
41	504
42	2
43	240
44	2
45	24
46	2
47	66
48	2
49	120
50	2
51	504
52	2
53	240
54	2
55	24
56	2
57	2
58	132
59	2
60	240
61	2
62	504
63	2
64	240
65	2
66	24
67	2

[2, 6, 2, 2, 12, 2, 30, 2, 24, 2, 2, 60, 2, 24, 2, 42, 2, 120, 2, 24, 2, 2, 252, 2, 240, 2, 24, 2, 30, 2, 504, 2, 240, 2, 24, 2, 2, 60, 2, 504, 2, 240, 2, 24, 2, 66, 2, 120, 2, 504, 2, 240, 2, 24, 2, 2, 132, 2, 240, 2, 504, 2, 240, 2, 24, 2]

cp's OEIS Frontend

A330541 Triangle read by rows: T(n,k) = gcd {x^n - x^k : x is an integer}, 0 < k < n.

Table of values

List of values

n	a(n)
2	2
3	6
4	2
5	2
6	12
7	2
8	30
9	2
10	24
11	2
12	2
13	60
14	2
15	24
16	2
17	42
18	2
19	120
20	2
21	24
22	2
23	2
24	252
25	2
26	240
27	2
28	24
29	2
30	30
31	2
32	504
33	2
34	240
35	2
36	24
37	2
38	2
39	60
40	2
41	504
42	2
43	240
44	2
45	24
46	2
47	66
48	2
49	120
50	2
51	504
52	2
53	240
54	2
55	24
56	2
57	2
58	132
59	2
60	240
61	2
62	504
63	2
64	240
65	2
66	24
67	2

n	a(n)
2	2
3	6
4	2
5	2
6	12
7	2
8	30
9	2
10	24
11	2
12	2
13	60
14	2
15	24
16	2
17	42
18	2
19	120
20	2
21	24
22	2
23	2
24	252
25	2
26	240
27	2
28	24
29	2
30	30
31	2
32	504
33	2
34	240
35	2
36	24
37	2
38	2
39	60
40	2
41	504
42	2
43	240
44	2
45	24
46	2
47	66
48	2
49	120
50	2
51	504
52	2
53	240
54	2
55	24
56	2
57	2
58	132
59	2
60	240
61	2
62	504
63	2
64	240
65	2
66	24
67	2

n	a(n)
2	2
3	6
4	2
5	2
6	12
7	2
8	30
9	2
10	24
11	2
12	2
13	60
14	2
15	24
16	2
17	42
18	2
19	120
20	2
21	24
22	2
23	2
24	252
25	2
26	240
27	2
28	24
29	2
30	30
31	2
32	504
33	2
34	240
35	2
36	24
37	2
38	2
39	60
40	2
41	504
42	2
43	240
44	2
45	24
46	2
47	66
48	2
49	120
50	2
51	504
52	2
53	240
54	2
55	24
56	2
57	2
58	132
59	2
60	240
61	2
62	504
63	2
64	240
65	2
66	24
67	2