A084885 - cp's OEIS frontend

A084885 Triangular array, read by rows: T(n,k) = denominator of arithmetic derivative of n/k, 1<=k<=n.

n	a(n)
1	1
2	1
3	1
4	1
5	4
6	1
7	1
8	1
9	9
10	1
11	1
12	4
13	9
14	1
15	1
16	1
17	1
18	1
19	4
20	25
21	1
22	1
23	4
24	9
25	2
26	25
27	36
28	1
29	1
30	1
31	9
32	1
33	25
34	9
35	49
36	1
37	1
38	4
39	1
40	4
41	25
42	4
43	49
44	16
45	1
46	1
47	1
48	9
49	4
50	1
51	9
52	49
53	1
54	27
55	1
56	1
57	4
58	9
59	2
60	25
61	36
62	49
63	16
64	27
65	100
66	1
67	1
68	1
69	1
70	1
71	25
72	1
73	49
74	4
75	9
76	25
77	121
78	1

[1, 1, 1, 1, 4, 1, 1, 1, 9, 1, 1, 4, 9, 1, 1, 1, 1, 1, 4, 25, 1, 1, 4, 9, 2, 25, 36, 1, 1, 1, 9, 1, 25, 9, 49, 1, 1, 4, 1, 4, 25, 4, 49, 16, 1, 1, 1, 9, 4, 1, 9, 49, 1, 27, 1, 1, 4, 9, 2, 25, 36, 49, 16, 27, 100, 1, 1, 1, 1, 1, 25, 1, 49, 4, 9, 25, 121, 1]

cp's OEIS Frontend

A084885 Triangular array, read by rows: T(n,k) = denominator of arithmetic derivative of n/k, 1<=k<=n.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	4
6	1
7	1
8	1
9	9
10	1
11	1
12	4
13	9
14	1
15	1
16	1
17	1
18	1
19	4
20	25
21	1
22	1
23	4
24	9
25	2
26	25
27	36
28	1
29	1
30	1
31	9
32	1
33	25
34	9
35	49
36	1
37	1
38	4
39	1
40	4
41	25
42	4
43	49
44	16
45	1
46	1
47	1
48	9
49	4
50	1
51	9
52	49
53	1
54	27
55	1
56	1
57	4
58	9
59	2
60	25
61	36
62	49
63	16
64	27
65	100
66	1
67	1
68	1
69	1
70	1
71	25
72	1
73	49
74	4
75	9
76	25
77	121
78	1

n	a(n)
1	1
2	1
3	1
4	1
5	4
6	1
7	1
8	1
9	9
10	1
11	1
12	4
13	9
14	1
15	1
16	1
17	1
18	1
19	4
20	25
21	1
22	1
23	4
24	9
25	2
26	25
27	36
28	1
29	1
30	1
31	9
32	1
33	25
34	9
35	49
36	1
37	1
38	4
39	1
40	4
41	25
42	4
43	49
44	16
45	1
46	1
47	1
48	9
49	4
50	1
51	9
52	49
53	1
54	27
55	1
56	1
57	4
58	9
59	2
60	25
61	36
62	49
63	16
64	27
65	100
66	1
67	1
68	1
69	1
70	1
71	25
72	1
73	49
74	4
75	9
76	25
77	121
78	1

n	a(n)
1	1
2	1
3	1
4	1
5	4
6	1
7	1
8	1
9	9
10	1
11	1
12	4
13	9
14	1
15	1
16	1
17	1
18	1
19	4
20	25
21	1
22	1
23	4
24	9
25	2
26	25
27	36
28	1
29	1
30	1
31	9
32	1
33	25
34	9
35	49
36	1
37	1
38	4
39	1
40	4
41	25
42	4
43	49
44	16
45	1
46	1
47	1
48	9
49	4
50	1
51	9
52	49
53	1
54	27
55	1
56	1
57	4
58	9
59	2
60	25
61	36
62	49
63	16
64	27
65	100
66	1
67	1
68	1
69	1
70	1
71	25
72	1
73	49
74	4
75	9
76	25
77	121
78	1