A299480 - cp's OEIS frontend

A299480 List of pairs (a,b) where in the n-th pair, a = number of odd divisors of n and b = number of even divisors of n.

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

[1, 0, 1, 1, 2, 0, 1, 2, 2, 0, 2, 2, 2, 0, 1, 3, 3, 0, 2, 2, 2, 0, 2, 4, 2, 0, 2, 2, 4, 0, 1, 4, 2, 0, 3, 3, 2, 0, 2, 4, 4, 0, 2, 2, 2, 0, 2, 6, 3, 0, 2, 2, 4, 0, 2, 4, 2, 0, 4, 4, 2, 0, 1, 5, 4, 0, 2, 2, 4, 0, 3, 6, 2, 0, 2, 2, 4, 0, 2, 6, 2, 0, 4, 4, 2, 0, 2, 4, 6, 0, 2, 2, 2, 0, 2, 8, 3, 0, 3, 3, 4, 0, 2, 4]

cp's OEIS Frontend

A299480 List of pairs (a,b) where in the n-th pair, a = number of odd divisors of n and b = number of even divisors of n.

Table of values

List of values

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

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

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