A054531 - cp's OEIS frontend

A054531 Triangular array T read by rows: T(n,k) = n/gcd(n,k) (n >= 1, 1 <= k <= n).

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

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

cp's OEIS Frontend

A054531 Triangular array T read by rows: T(n,k) = n/gcd(n,k) (n >= 1, 1 <= k <= n).

Table of values

List of values

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

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

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