A290532 - cp's OEIS frontend

A290532 Irregular triangle read by rows in which row n lists the number of divisors of each divisor of n.

n	a(n)
1	1
2	1
3	2
4	1
5	2
6	1
7	2
8	3
9	1
10	2
11	1
12	2
13	2
14	4
15	1
16	2
17	1
18	2
19	3
20	4
21	1
22	2
23	3
24	1
25	2
26	2
27	4
28	1
29	2
30	1
31	2
32	2
33	3
34	4
35	6
36	1
37	2
38	1
39	2
40	2
41	4
42	1
43	2
44	2
45	4
46	1
47	2
48	3
49	4
50	5
51	1
52	2
53	1
54	2
55	2
56	4
57	3
58	6
59	1
60	2
61	1
62	2
63	3
64	2
65	4
66	6
67	1
68	2
69	2
70	4
71	1
72	2
73	2
74	4
75	1
76	2
77	1
78	2
79	2
80	3
81	4
82	4
83	6
84	8
85	1
86	2
87	3

[1, 1, 2, 1, 2, 1, 2, 3, 1, 2, 1, 2, 2, 4, 1, 2, 1, 2, 3, 4, 1, 2, 3, 1, 2, 2, 4, 1, 2, 1, 2, 2, 3, 4, 6, 1, 2, 1, 2, 2, 4, 1, 2, 2, 4, 1, 2, 3, 4, 5, 1, 2, 1, 2, 2, 4, 3, 6, 1, 2, 1, 2, 3, 2, 4, 6, 1, 2, 2, 4, 1, 2, 2, 4, 1, 2, 1, 2, 2, 3, 4, 4, 6, 8, 1, 2, 3]

cp's OEIS Frontend

A290532 Irregular triangle read by rows in which row n lists the number of divisors of each divisor of n.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	1
5	2
6	1
7	2
8	3
9	1
10	2
11	1
12	2
13	2
14	4
15	1
16	2
17	1
18	2
19	3
20	4
21	1
22	2
23	3
24	1
25	2
26	2
27	4
28	1
29	2
30	1
31	2
32	2
33	3
34	4
35	6
36	1
37	2
38	1
39	2
40	2
41	4
42	1
43	2
44	2
45	4
46	1
47	2
48	3
49	4
50	5
51	1
52	2
53	1
54	2
55	2
56	4
57	3
58	6
59	1
60	2
61	1
62	2
63	3
64	2
65	4
66	6
67	1
68	2
69	2
70	4
71	1
72	2
73	2
74	4
75	1
76	2
77	1
78	2
79	2
80	3
81	4
82	4
83	6
84	8
85	1
86	2
87	3

n	a(n)
1	1
2	1
3	2
4	1
5	2
6	1
7	2
8	3
9	1
10	2
11	1
12	2
13	2
14	4
15	1
16	2
17	1
18	2
19	3
20	4
21	1
22	2
23	3
24	1
25	2
26	2
27	4
28	1
29	2
30	1
31	2
32	2
33	3
34	4
35	6
36	1
37	2
38	1
39	2
40	2
41	4
42	1
43	2
44	2
45	4
46	1
47	2
48	3
49	4
50	5
51	1
52	2
53	1
54	2
55	2
56	4
57	3
58	6
59	1
60	2
61	1
62	2
63	3
64	2
65	4
66	6
67	1
68	2
69	2
70	4
71	1
72	2
73	2
74	4
75	1
76	2
77	1
78	2
79	2
80	3
81	4
82	4
83	6
84	8
85	1
86	2
87	3

n	a(n)
1	1
2	1
3	2
4	1
5	2
6	1
7	2
8	3
9	1
10	2
11	1
12	2
13	2
14	4
15	1
16	2
17	1
18	2
19	3
20	4
21	1
22	2
23	3
24	1
25	2
26	2
27	4
28	1
29	2
30	1
31	2
32	2
33	3
34	4
35	6
36	1
37	2
38	1
39	2
40	2
41	4
42	1
43	2
44	2
45	4
46	1
47	2
48	3
49	4
50	5
51	1
52	2
53	1
54	2
55	2
56	4
57	3
58	6
59	1
60	2
61	1
62	2
63	3
64	2
65	4
66	6
67	1
68	2
69	2
70	4
71	1
72	2
73	2
74	4
75	1
76	2
77	1
78	2
79	2
80	3
81	4
82	4
83	6
84	8
85	1
86	2
87	3