A278570 - cp's OEIS frontend

A278570 a(n) = maximum absolute value of coefficients in the cyclotomic polynomial C(N,x), where N = n-th number which a product of three distinct odd primes = A046389(n).

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

[2, 2, 2, 1, 2, 2, 2, 2, 2, 3, 1, 2, 1, 2, 1, 1, 2, 2, 3, 2, 2, 2, 2, 1, 1, 3, 2, 2, 1, 2, 2, 2, 2, 1, 1, 2, 1, 1, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 1, 2, 1, 2, 3, 2, 2, 2, 1, 2, 3, 1, 1, 1, 2, 2, 2, 1, 2, 3, 1, 2, 3, 2, 2, 1, 2, 2, 2, 1, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 2, 3, 1, 2, 2, 2, 1, 3, 2]

cp's OEIS Frontend

A278570 a(n) = maximum absolute value of coefficients in the cyclotomic polynomial C(N,x), where N = n-th number which a product of three distinct odd primes = A046389(n).

Table of values

List of values

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

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

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