A127472 - cp's OEIS frontend

A127472 Triangle T(n,k) = Sum_{j=k..n, j|n, k|j} phi(j) read by rows, 1<=k<=n.

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

[1, 2, 1, 3, 0, 2, 4, 3, 0, 2, 5, 0, 0, 0, 4, 6, 3, 4, 0, 0, 2, 7, 0, 0, 0, 0, 0, 6, 8, 7, 0, 6, 0, 0, 0, 4, 9, 0, 8, 0, 0, 0, 0, 0, 6, 10, 5, 0, 0, 8, 0, 0, 0, 0, 4, 11, 0, 0, 0, 0, 0, 0, 0, 0, 0, 10, 12, 9, 8, 6, 0, 6, 0, 0, 0, 0, 0, 4, 13]

cp's OEIS Frontend

A127472 Triangle T(n,k) = Sum_{j=k..n, j|n, k|j} phi(j) read by rows, 1<=k<=n.

Table of values

List of values

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

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

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