A294881 - cp's OEIS frontend

A294881 Number of proper divisors of n that are irreducible when their binary expansion is interpreted as polynomial over GF(2).

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	2
7	0
8	1
9	1
10	1
11	0
12	2
13	0
14	2
15	1
16	1
17	0
18	2
19	0
20	1
21	2
22	2
23	0
24	2
25	0
26	2
27	1
28	2
29	0
30	2
31	0
32	1
33	2
34	1
35	1
36	2
37	0
38	2
39	2
40	1
41	0
42	3
43	0
44	2
45	1
46	1
47	0
48	2
49	1
50	2
51	1
52	2
53	0
54	2
55	1
56	2
57	2
58	1
59	0
60	2
61	0
62	2
63	2
64	1
65	1
66	3
67	0
68	1
69	1
70	2
71	0
72	2
73	0
74	2
75	2
76	2
77	2
78	3
79	0
80	1
81	1
82	2
83	0
84	3
85	0
86	1
87	1
88	2
89	0
90	2
91	2
92	1
93	2
94	2
95	1
96	2
97	0
98	2
99	2
100	2
101	0
102	2
103	0
104	2
105	2

[0, 0, 0, 1, 0, 2, 0, 1, 1, 1, 0, 2, 0, 2, 1, 1, 0, 2, 0, 1, 2, 2, 0, 2, 0, 2, 1, 2, 0, 2, 0, 1, 2, 1, 1, 2, 0, 2, 2, 1, 0, 3, 0, 2, 1, 1, 0, 2, 1, 2, 1, 2, 0, 2, 1, 2, 2, 1, 0, 2, 0, 2, 2, 1, 1, 3, 0, 1, 1, 2, 0, 2, 0, 2, 2, 2, 2, 3, 0, 1, 1, 2, 0, 3, 0, 1, 1, 2, 0, 2, 2, 1, 2, 2, 1, 2, 0, 2, 2, 2, 0, 2, 0, 2, 2]

cp's OEIS Frontend

A294881 Number of proper divisors of n that are irreducible when their binary expansion is interpreted as polynomial over GF(2).

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	2
7	0
8	1
9	1
10	1
11	0
12	2
13	0
14	2
15	1
16	1
17	0
18	2
19	0
20	1
21	2
22	2
23	0
24	2
25	0
26	2
27	1
28	2
29	0
30	2
31	0
32	1
33	2
34	1
35	1
36	2
37	0
38	2
39	2
40	1
41	0
42	3
43	0
44	2
45	1
46	1
47	0
48	2
49	1
50	2
51	1
52	2
53	0
54	2
55	1
56	2
57	2
58	1
59	0
60	2
61	0
62	2
63	2
64	1
65	1
66	3
67	0
68	1
69	1
70	2
71	0
72	2
73	0
74	2
75	2
76	2
77	2
78	3
79	0
80	1
81	1
82	2
83	0
84	3
85	0
86	1
87	1
88	2
89	0
90	2
91	2
92	1
93	2
94	2
95	1
96	2
97	0
98	2
99	2
100	2
101	0
102	2
103	0
104	2
105	2

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	2
7	0
8	1
9	1
10	1
11	0
12	2
13	0
14	2
15	1
16	1
17	0
18	2
19	0
20	1
21	2
22	2
23	0
24	2
25	0
26	2
27	1
28	2
29	0
30	2
31	0
32	1
33	2
34	1
35	1
36	2
37	0
38	2
39	2
40	1
41	0
42	3
43	0
44	2
45	1
46	1
47	0
48	2
49	1
50	2
51	1
52	2
53	0
54	2
55	1
56	2
57	2
58	1
59	0
60	2
61	0
62	2
63	2
64	1
65	1
66	3
67	0
68	1
69	1
70	2
71	0
72	2
73	0
74	2
75	2
76	2
77	2
78	3
79	0
80	1
81	1
82	2
83	0
84	3
85	0
86	1
87	1
88	2
89	0
90	2
91	2
92	1
93	2
94	2
95	1
96	2
97	0
98	2
99	2
100	2
101	0
102	2
103	0
104	2
105	2

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	2
7	0
8	1
9	1
10	1
11	0
12	2
13	0
14	2
15	1
16	1
17	0
18	2
19	0
20	1
21	2
22	2
23	0
24	2
25	0
26	2
27	1
28	2
29	0
30	2
31	0
32	1
33	2
34	1
35	1
36	2
37	0
38	2
39	2
40	1
41	0
42	3
43	0
44	2
45	1
46	1
47	0
48	2
49	1
50	2
51	1
52	2
53	0
54	2
55	1
56	2
57	2
58	1
59	0
60	2
61	0
62	2
63	2
64	1
65	1
66	3
67	0
68	1
69	1
70	2
71	0
72	2
73	0
74	2
75	2
76	2
77	2
78	3
79	0
80	1
81	1
82	2
83	0
84	3
85	0
86	1
87	1
88	2
89	0
90	2
91	2
92	1
93	2
94	2
95	1
96	2
97	0
98	2
99	2
100	2
101	0
102	2
103	0
104	2
105	2