A206778 - cp's OEIS frontend

A206778 Irregular triangle in which n-th row lists squarefree divisors (A005117) of n.

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

[1, 1, 2, 1, 3, 1, 2, 1, 5, 1, 2, 3, 6, 1, 7, 1, 2, 1, 3, 1, 2, 5, 10, 1, 11, 1, 2, 3, 6, 1, 13, 1, 2, 7, 14, 1, 3, 5, 15, 1, 2, 1, 17, 1, 2, 3, 6, 1, 19, 1, 2, 5, 10, 1, 3, 7, 21, 1, 2, 11, 22, 1, 23, 1, 2, 3, 6, 1, 5, 1, 2, 13, 26, 1, 3, 1, 2, 7, 14, 1, 29]

cp's OEIS Frontend

A206778 Irregular triangle in which n-th row lists squarefree divisors (A005117) of n.

Table of values

List of values

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

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

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