A081844 - cp's OEIS frontend

A081844 Number of irreducible factors of x^(2n+1) - 1 over GF(2).

n	a(n)
0	1
1	2
2	2
3	3
4	3
5	2
6	2
7	5
8	3
9	2
10	6
11	3
12	3
13	4
14	2
15	7
16	5
17	6
18	2
19	5
20	3
21	4
22	8
23	3
24	5
25	8
26	2
27	5
28	5
29	2
30	2
31	13
32	7
33	2
34	6
35	3
36	9
37	8
38	6
39	3
40	5
41	2
42	12
43	5
44	9
45	10
46	14
47	5
48	3
49	8
50	2
51	3
52	15
53	2
54	4
55	5
56	5
57	6
58	12
59	9
60	3
61	8
62	4
63	19
64	11
65	2
66	10
67	11
68	3
69	2
70	6
71	5
72	7
73	10
74	2
75	11
76	13
77	14
78	4
79	5
80	9
81	2
82	14
83	3
84	3
85	12
86	2
87	9
88	5
89	2
90	2
91	5
92	7
93	8
94	20
95	3
96	3
97	20

[1, 2, 2, 3, 3, 2, 2, 5, 3, 2, 6, 3, 3, 4, 2, 7, 5, 6, 2, 5, 3, 4, 8, 3, 5, 8, 2, 5, 5, 2, 2, 13, 7, 2, 6, 3, 9, 8, 6, 3, 5, 2, 12, 5, 9, 10, 14, 5, 3, 8, 2, 3, 15, 2, 4, 5, 5, 6, 12, 9, 3, 8, 4, 19, 11, 2, 10, 11, 3, 2, 6, 5, 7, 10, 2, 11, 13, 14, 4, 5, 9, 2, 14, 3, 3, 12, 2, 9, 5, 2, 2, 5, 7, 8, 20, 3, 3, 20]

cp's OEIS Frontend

A081844 Number of irreducible factors of x^(2n+1) - 1 over GF(2).

Table of values

List of values

n	a(n)
0	1
1	2
2	2
3	3
4	3
5	2
6	2
7	5
8	3
9	2
10	6
11	3
12	3
13	4
14	2
15	7
16	5
17	6
18	2
19	5
20	3
21	4
22	8
23	3
24	5
25	8
26	2
27	5
28	5
29	2
30	2
31	13
32	7
33	2
34	6
35	3
36	9
37	8
38	6
39	3
40	5
41	2
42	12
43	5
44	9
45	10
46	14
47	5
48	3
49	8
50	2
51	3
52	15
53	2
54	4
55	5
56	5
57	6
58	12
59	9
60	3
61	8
62	4
63	19
64	11
65	2
66	10
67	11
68	3
69	2
70	6
71	5
72	7
73	10
74	2
75	11
76	13
77	14
78	4
79	5
80	9
81	2
82	14
83	3
84	3
85	12
86	2
87	9
88	5
89	2
90	2
91	5
92	7
93	8
94	20
95	3
96	3
97	20

n	a(n)
0	1
1	2
2	2
3	3
4	3
5	2
6	2
7	5
8	3
9	2
10	6
11	3
12	3
13	4
14	2
15	7
16	5
17	6
18	2
19	5
20	3
21	4
22	8
23	3
24	5
25	8
26	2
27	5
28	5
29	2
30	2
31	13
32	7
33	2
34	6
35	3
36	9
37	8
38	6
39	3
40	5
41	2
42	12
43	5
44	9
45	10
46	14
47	5
48	3
49	8
50	2
51	3
52	15
53	2
54	4
55	5
56	5
57	6
58	12
59	9
60	3
61	8
62	4
63	19
64	11
65	2
66	10
67	11
68	3
69	2
70	6
71	5
72	7
73	10
74	2
75	11
76	13
77	14
78	4
79	5
80	9
81	2
82	14
83	3
84	3
85	12
86	2
87	9
88	5
89	2
90	2
91	5
92	7
93	8
94	20
95	3
96	3
97	20

n	a(n)
0	1
1	2
2	2
3	3
4	3
5	2
6	2
7	5
8	3
9	2
10	6
11	3
12	3
13	4
14	2
15	7
16	5
17	6
18	2
19	5
20	3
21	4
22	8
23	3
24	5
25	8
26	2
27	5
28	5
29	2
30	2
31	13
32	7
33	2
34	6
35	3
36	9
37	8
38	6
39	3
40	5
41	2
42	12
43	5
44	9
45	10
46	14
47	5
48	3
49	8
50	2
51	3
52	15
53	2
54	4
55	5
56	5
57	6
58	12
59	9
60	3
61	8
62	4
63	19
64	11
65	2
66	10
67	11
68	3
69	2
70	6
71	5
72	7
73	10
74	2
75	11
76	13
77	14
78	4
79	5
80	9
81	2
82	14
83	3
84	3
85	12
86	2
87	9
88	5
89	2
90	2
91	5
92	7
93	8
94	20
95	3
96	3
97	20