A127527 - cp's OEIS frontend

A127527 Triangle T(n,k)= tau(k)*phi(n/k) if k|n, else T(n,k)=0.

n	a(n)
1	1
2	1
3	2
4	2
5	0
6	2
7	2
8	2
9	0
10	3
11	4
12	0
13	0
14	0
15	2
16	2
17	4
18	2
19	0
20	0
21	4
22	6
23	0
24	0
25	0
26	0
27	0
28	2
29	4
30	4
31	0
32	3
33	0
34	0
35	0
36	4
37	6
38	0
39	4
40	0
41	0
42	0
43	0
44	0
45	3
46	4
47	8
48	0
49	0
50	2
51	0
52	0
53	0
54	0
55	4

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

cp's OEIS Frontend

A127527 Triangle T(n,k)= tau(k)*phi(n/k) if k|n, else T(n,k)=0.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	2
5	0
6	2
7	2
8	2
9	0
10	3
11	4
12	0
13	0
14	0
15	2
16	2
17	4
18	2
19	0
20	0
21	4
22	6
23	0
24	0
25	0
26	0
27	0
28	2
29	4
30	4
31	0
32	3
33	0
34	0
35	0
36	4
37	6
38	0
39	4
40	0
41	0
42	0
43	0
44	0
45	3
46	4
47	8
48	0
49	0
50	2
51	0
52	0
53	0
54	0
55	4

n	a(n)
1	1
2	1
3	2
4	2
5	0
6	2
7	2
8	2
9	0
10	3
11	4
12	0
13	0
14	0
15	2
16	2
17	4
18	2
19	0
20	0
21	4
22	6
23	0
24	0
25	0
26	0
27	0
28	2
29	4
30	4
31	0
32	3
33	0
34	0
35	0
36	4
37	6
38	0
39	4
40	0
41	0
42	0
43	0
44	0
45	3
46	4
47	8
48	0
49	0
50	2
51	0
52	0
53	0
54	0
55	4

n	a(n)
1	1
2	1
3	2
4	2
5	0
6	2
7	2
8	2
9	0
10	3
11	4
12	0
13	0
14	0
15	2
16	2
17	4
18	2
19	0
20	0
21	4
22	6
23	0
24	0
25	0
26	0
27	0
28	2
29	4
30	4
31	0
32	3
33	0
34	0
35	0
36	4
37	6
38	0
39	4
40	0
41	0
42	0
43	0
44	0
45	3
46	4
47	8
48	0
49	0
50	2
51	0
52	0
53	0
54	0
55	4