A224834 - cp's OEIS frontend

A224834 a(n) = Sum {d|n, d <= n^(1/2)} tau(d)^2.

n	a(n)
1	1
2	1
3	1
4	5
5	1
6	5
7	1
8	5
9	5
10	5
11	1
12	9
13	1
14	5
15	5
16	14
17	1
18	9
19	1
20	14
21	5
22	5
23	1
24	18
25	5
26	5
27	5
28	14
29	1
30	13
31	1
32	14
33	5
34	5
35	5
36	34
37	1
38	5
39	5
40	18
41	1
42	25
43	1
44	14
45	9
46	5
47	1
48	34
49	5
50	9
51	5
52	14
53	1
54	25
55	5
56	18
57	5
58	5
59	1
60	38
61	1
62	5
63	9
64	30
65	5
66	25
67	1
68	14
69	5
70	13
71	1
72	50
73	1
74	5
75	9

[1, 1, 1, 5, 1, 5, 1, 5, 5, 5, 1, 9, 1, 5, 5, 14, 1, 9, 1, 14, 5, 5, 1, 18, 5, 5, 5, 14, 1, 13, 1, 14, 5, 5, 5, 34, 1, 5, 5, 18, 1, 25, 1, 14, 9, 5, 1, 34, 5, 9, 5, 14, 1, 25, 5, 18, 5, 5, 1, 38, 1, 5, 9, 30, 5, 25, 1, 14, 5, 13, 1, 50, 1, 5, 9]

cp's OEIS Frontend

A224834 a(n) = Sum {d|n, d <= n^(1/2)} tau(d)^2.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	5
5	1
6	5
7	1
8	5
9	5
10	5
11	1
12	9
13	1
14	5
15	5
16	14
17	1
18	9
19	1
20	14
21	5
22	5
23	1
24	18
25	5
26	5
27	5
28	14
29	1
30	13
31	1
32	14
33	5
34	5
35	5
36	34
37	1
38	5
39	5
40	18
41	1
42	25
43	1
44	14
45	9
46	5
47	1
48	34
49	5
50	9
51	5
52	14
53	1
54	25
55	5
56	18
57	5
58	5
59	1
60	38
61	1
62	5
63	9
64	30
65	5
66	25
67	1
68	14
69	5
70	13
71	1
72	50
73	1
74	5
75	9

n	a(n)
1	1
2	1
3	1
4	5
5	1
6	5
7	1
8	5
9	5
10	5
11	1
12	9
13	1
14	5
15	5
16	14
17	1
18	9
19	1
20	14
21	5
22	5
23	1
24	18
25	5
26	5
27	5
28	14
29	1
30	13
31	1
32	14
33	5
34	5
35	5
36	34
37	1
38	5
39	5
40	18
41	1
42	25
43	1
44	14
45	9
46	5
47	1
48	34
49	5
50	9
51	5
52	14
53	1
54	25
55	5
56	18
57	5
58	5
59	1
60	38
61	1
62	5
63	9
64	30
65	5
66	25
67	1
68	14
69	5
70	13
71	1
72	50
73	1
74	5
75	9

n	a(n)
1	1
2	1
3	1
4	5
5	1
6	5
7	1
8	5
9	5
10	5
11	1
12	9
13	1
14	5
15	5
16	14
17	1
18	9
19	1
20	14
21	5
22	5
23	1
24	18
25	5
26	5
27	5
28	14
29	1
30	13
31	1
32	14
33	5
34	5
35	5
36	34
37	1
38	5
39	5
40	18
41	1
42	25
43	1
44	14
45	9
46	5
47	1
48	34
49	5
50	9
51	5
52	14
53	1
54	25
55	5
56	18
57	5
58	5
59	1
60	38
61	1
62	5
63	9
64	30
65	5
66	25
67	1
68	14
69	5
70	13
71	1
72	50
73	1
74	5
75	9