A070288 - cp's OEIS frontend

A070288 a(n) = Sum_{d|n} omega(d)*omega(n/d).

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

[0, 0, 0, 1, 0, 2, 0, 2, 1, 2, 0, 6, 0, 2, 2, 3, 0, 6, 0, 6, 2, 2, 0, 10, 1, 2, 2, 6, 0, 12, 0, 4, 2, 2, 2, 14, 0, 2, 2, 10, 0, 12, 0, 6, 6, 2, 0, 14, 1, 6, 2, 6, 0, 10, 2, 10, 2, 2, 0, 26, 0, 2, 6, 5, 2, 12, 0, 6, 2, 12, 0, 22, 0, 2, 6, 6, 2, 12, 0, 14, 3, 2, 0, 26, 2, 2, 2, 10, 0, 26, 2, 6, 2, 2, 2]

cp's OEIS Frontend

A070288 a(n) = Sum_{d|n} omega(d)*omega(n/d).

Table of values

List of values

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

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

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