A127475 - cp's OEIS frontend

A127475 Triangle T(n,k) read by rows: T(n,k) = mu(n)*phi(k) if k|n, else T(n,k)=0.

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

[1, -1, -1, -1, 0, -2, 0, 0, 0, 0, -1, 0, 0, 0, -4, 1, 1, 2, 0, 0, 2, -1, 0, 0, 0, 0, 0, -6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 4, 0, 0, 0, 0, 4, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, -10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -12]

cp's OEIS Frontend

A127475 Triangle T(n,k) read by rows: T(n,k) = mu(n)*phi(k) if k|n, else T(n,k)=0.

Table of values

List of values

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

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

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