A181538 - cp's OEIS frontend

A181538 T(n, k) = sum_(1 <= j <= k) [j | k] j mu(k / j) gcd(n, k), triangle read by rows.

n	a(n)
1	1
2	1
3	2
4	1
5	1
6	6
7	1
8	2
9	2
10	8
11	1
12	1
13	2
14	2
15	20
16	1
17	2
18	6
19	4
20	4
21	12
22	1
23	1
24	2
25	2
26	4
27	2
28	42
29	1
30	2
31	2
32	8
33	4
34	4
35	6
36	32
37	1
38	1
39	6
40	2
41	4
42	6
43	6
44	4
45	54
46	1
47	2
48	2
49	4
50	20
51	4
52	6
53	8
54	6
55	40
56	1
57	1
58	2
59	2
60	4
61	2
62	6
63	4
64	6
65	4
66	110
67	1
68	2
69	6
70	8
71	4
72	12
73	6
74	16
75	18
76	8
77	10
78	48

[1, 1, 2, 1, 1, 6, 1, 2, 2, 8, 1, 1, 2, 2, 20, 1, 2, 6, 4, 4, 12, 1, 1, 2, 2, 4, 2, 42, 1, 2, 2, 8, 4, 4, 6, 32, 1, 1, 6, 2, 4, 6, 6, 4, 54, 1, 2, 2, 4, 20, 4, 6, 8, 6, 40, 1, 1, 2, 2, 4, 2, 6, 4, 6, 4, 110, 1, 2, 6, 8, 4, 12, 6, 16, 18, 8, 10, 48]

cp's OEIS Frontend

A181538 T(n, k) = sum_(1 <= j <= k) [j | k] j mu(k / j) gcd(n, k), triangle read by rows.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	1
5	1
6	6
7	1
8	2
9	2
10	8
11	1
12	1
13	2
14	2
15	20
16	1
17	2
18	6
19	4
20	4
21	12
22	1
23	1
24	2
25	2
26	4
27	2
28	42
29	1
30	2
31	2
32	8
33	4
34	4
35	6
36	32
37	1
38	1
39	6
40	2
41	4
42	6
43	6
44	4
45	54
46	1
47	2
48	2
49	4
50	20
51	4
52	6
53	8
54	6
55	40
56	1
57	1
58	2
59	2
60	4
61	2
62	6
63	4
64	6
65	4
66	110
67	1
68	2
69	6
70	8
71	4
72	12
73	6
74	16
75	18
76	8
77	10
78	48

n	a(n)
1	1
2	1
3	2
4	1
5	1
6	6
7	1
8	2
9	2
10	8
11	1
12	1
13	2
14	2
15	20
16	1
17	2
18	6
19	4
20	4
21	12
22	1
23	1
24	2
25	2
26	4
27	2
28	42
29	1
30	2
31	2
32	8
33	4
34	4
35	6
36	32
37	1
38	1
39	6
40	2
41	4
42	6
43	6
44	4
45	54
46	1
47	2
48	2
49	4
50	20
51	4
52	6
53	8
54	6
55	40
56	1
57	1
58	2
59	2
60	4
61	2
62	6
63	4
64	6
65	4
66	110
67	1
68	2
69	6
70	8
71	4
72	12
73	6
74	16
75	18
76	8
77	10
78	48

n	a(n)
1	1
2	1
3	2
4	1
5	1
6	6
7	1
8	2
9	2
10	8
11	1
12	1
13	2
14	2
15	20
16	1
17	2
18	6
19	4
20	4
21	12
22	1
23	1
24	2
25	2
26	4
27	2
28	42
29	1
30	2
31	2
32	8
33	4
34	4
35	6
36	32
37	1
38	1
39	6
40	2
41	4
42	6
43	6
44	4
45	54
46	1
47	2
48	2
49	4
50	20
51	4
52	6
53	8
54	6
55	40
56	1
57	1
58	2
59	2
60	4
61	2
62	6
63	4
64	6
65	4
66	110
67	1
68	2
69	6
70	8
71	4
72	12
73	6
74	16
75	18
76	8
77	10
78	48