A086374 - cp's OEIS frontend

A086374 Number of factors over Q in the factorization of T_n(x) + 1 where T_n(x) is the Chebyshev polynomial of the first kind.

n	a(n)
1	1
2	2
3	3
4	2
5	3
6	4
7	3
8	2
9	5
10	4
11	3
12	4
13	3
14	4
15	7
16	2
17	3
18	6
19	3
20	4
21	7
22	4
23	3
24	4
25	5
26	4
27	7
28	4
29	3
30	8
31	3
32	2
33	7
34	4
35	7
36	6
37	3
38	4
39	7
40	4
41	3
42	8
43	3
44	4
45	11
46	4
47	3
48	4
49	5
50	6
51	7
52	4
53	3
54	8
55	7
56	4
57	7
58	4
59	3
60	8
61	3
62	4
63	11
64	2
65	7
66	8
67	3
68	4
69	7
70	8
71	3
72	6
73	3
74	4
75	11
76	4
77	7
78	8
79	3
80	4
81	9
82	4
83	3
84	8
85	7
86	4
87	7
88	4
89	3
90	12
91	7
92	4
93	7
94	4
95	7
96	4
97	3
98	6
99	11
100	6
101	3
102	8
103	3

[1, 2, 3, 2, 3, 4, 3, 2, 5, 4, 3, 4, 3, 4, 7, 2, 3, 6, 3, 4, 7, 4, 3, 4, 5, 4, 7, 4, 3, 8, 3, 2, 7, 4, 7, 6, 3, 4, 7, 4, 3, 8, 3, 4, 11, 4, 3, 4, 5, 6, 7, 4, 3, 8, 7, 4, 7, 4, 3, 8, 3, 4, 11, 2, 7, 8, 3, 4, 7, 8, 3, 6, 3, 4, 11, 4, 7, 8, 3, 4, 9, 4, 3, 8, 7, 4, 7, 4, 3, 12, 7, 4, 7, 4, 7, 4, 3, 6, 11, 6, 3, 8, 3]

cp's OEIS Frontend

A086374 Number of factors over Q in the factorization of T_n(x) + 1 where T_n(x) is the Chebyshev polynomial of the first kind.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	2
5	3
6	4
7	3
8	2
9	5
10	4
11	3
12	4
13	3
14	4
15	7
16	2
17	3
18	6
19	3
20	4
21	7
22	4
23	3
24	4
25	5
26	4
27	7
28	4
29	3
30	8
31	3
32	2
33	7
34	4
35	7
36	6
37	3
38	4
39	7
40	4
41	3
42	8
43	3
44	4
45	11
46	4
47	3
48	4
49	5
50	6
51	7
52	4
53	3
54	8
55	7
56	4
57	7
58	4
59	3
60	8
61	3
62	4
63	11
64	2
65	7
66	8
67	3
68	4
69	7
70	8
71	3
72	6
73	3
74	4
75	11
76	4
77	7
78	8
79	3
80	4
81	9
82	4
83	3
84	8
85	7
86	4
87	7
88	4
89	3
90	12
91	7
92	4
93	7
94	4
95	7
96	4
97	3
98	6
99	11
100	6
101	3
102	8
103	3

n	a(n)
1	1
2	2
3	3
4	2
5	3
6	4
7	3
8	2
9	5
10	4
11	3
12	4
13	3
14	4
15	7
16	2
17	3
18	6
19	3
20	4
21	7
22	4
23	3
24	4
25	5
26	4
27	7
28	4
29	3
30	8
31	3
32	2
33	7
34	4
35	7
36	6
37	3
38	4
39	7
40	4
41	3
42	8
43	3
44	4
45	11
46	4
47	3
48	4
49	5
50	6
51	7
52	4
53	3
54	8
55	7
56	4
57	7
58	4
59	3
60	8
61	3
62	4
63	11
64	2
65	7
66	8
67	3
68	4
69	7
70	8
71	3
72	6
73	3
74	4
75	11
76	4
77	7
78	8
79	3
80	4
81	9
82	4
83	3
84	8
85	7
86	4
87	7
88	4
89	3
90	12
91	7
92	4
93	7
94	4
95	7
96	4
97	3
98	6
99	11
100	6
101	3
102	8
103	3

n	a(n)
1	1
2	2
3	3
4	2
5	3
6	4
7	3
8	2
9	5
10	4
11	3
12	4
13	3
14	4
15	7
16	2
17	3
18	6
19	3
20	4
21	7
22	4
23	3
24	4
25	5
26	4
27	7
28	4
29	3
30	8
31	3
32	2
33	7
34	4
35	7
36	6
37	3
38	4
39	7
40	4
41	3
42	8
43	3
44	4
45	11
46	4
47	3
48	4
49	5
50	6
51	7
52	4
53	3
54	8
55	7
56	4
57	7
58	4
59	3
60	8
61	3
62	4
63	11
64	2
65	7
66	8
67	3
68	4
69	7
70	8
71	3
72	6
73	3
74	4
75	11
76	4
77	7
78	8
79	3
80	4
81	9
82	4
83	3
84	8
85	7
86	4
87	7
88	4
89	3
90	12
91	7
92	4
93	7
94	4
95	7
96	4
97	3
98	6
99	11
100	6
101	3
102	8
103	3