A305567 - cp's OEIS frontend

A305567 Irregular triangle where T(n,k) is the number of finite sets of positive integers with least common multiple n and greatest common divisor k, where k runs over all divisors of n.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	2
7	1
8	1
9	1
10	1
11	7
12	1
13	1
14	1
15	1
16	1
17	4
18	2
19	1
20	1
21	2
22	1
23	1
24	7
25	1
26	1
27	1
28	1
29	1
30	32
31	7
32	2
33	1
34	1
35	1
36	1
37	1
38	7
39	1
40	1
41	1
42	7
43	1
44	1
45	1
46	8
47	4
48	2
49	1
50	1
51	1
52	1
53	32
54	2
55	7
56	1
57	1
58	1
59	1
60	1
61	32
62	7
63	1
64	2
65	1
66	1
67	7
68	1
69	1
70	1
71	7
72	1
73	1
74	1
75	1
76	1
77	136
78	32
79	4
80	7
81	2
82	1
83	1
84	1
85	2

[1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 7, 1, 1, 1, 1, 1, 4, 2, 1, 1, 2, 1, 1, 7, 1, 1, 1, 1, 1, 32, 7, 2, 1, 1, 1, 1, 1, 7, 1, 1, 1, 7, 1, 1, 1, 8, 4, 2, 1, 1, 1, 1, 32, 2, 7, 1, 1, 1, 1, 1, 32, 7, 1, 2, 1, 1, 7, 1, 1, 1, 7, 1, 1, 1, 1, 1, 136, 32, 4, 7, 2, 1, 1, 1, 2]

cp's OEIS Frontend

A305567 Irregular triangle where T(n,k) is the number of finite sets of positive integers with least common multiple n and greatest common divisor k, where k runs over all divisors of n.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	2
7	1
8	1
9	1
10	1
11	7
12	1
13	1
14	1
15	1
16	1
17	4
18	2
19	1
20	1
21	2
22	1
23	1
24	7
25	1
26	1
27	1
28	1
29	1
30	32
31	7
32	2
33	1
34	1
35	1
36	1
37	1
38	7
39	1
40	1
41	1
42	7
43	1
44	1
45	1
46	8
47	4
48	2
49	1
50	1
51	1
52	1
53	32
54	2
55	7
56	1
57	1
58	1
59	1
60	1
61	32
62	7
63	1
64	2
65	1
66	1
67	7
68	1
69	1
70	1
71	7
72	1
73	1
74	1
75	1
76	1
77	136
78	32
79	4
80	7
81	2
82	1
83	1
84	1
85	2

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	2
7	1
8	1
9	1
10	1
11	7
12	1
13	1
14	1
15	1
16	1
17	4
18	2
19	1
20	1
21	2
22	1
23	1
24	7
25	1
26	1
27	1
28	1
29	1
30	32
31	7
32	2
33	1
34	1
35	1
36	1
37	1
38	7
39	1
40	1
41	1
42	7
43	1
44	1
45	1
46	8
47	4
48	2
49	1
50	1
51	1
52	1
53	32
54	2
55	7
56	1
57	1
58	1
59	1
60	1
61	32
62	7
63	1
64	2
65	1
66	1
67	7
68	1
69	1
70	1
71	7
72	1
73	1
74	1
75	1
76	1
77	136
78	32
79	4
80	7
81	2
82	1
83	1
84	1
85	2

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	2
7	1
8	1
9	1
10	1
11	7
12	1
13	1
14	1
15	1
16	1
17	4
18	2
19	1
20	1
21	2
22	1
23	1
24	7
25	1
26	1
27	1
28	1
29	1
30	32
31	7
32	2
33	1
34	1
35	1
36	1
37	1
38	7
39	1
40	1
41	1
42	7
43	1
44	1
45	1
46	8
47	4
48	2
49	1
50	1
51	1
52	1
53	32
54	2
55	7
56	1
57	1
58	1
59	1
60	1
61	32
62	7
63	1
64	2
65	1
66	1
67	7
68	1
69	1
70	1
71	7
72	1
73	1
74	1
75	1
76	1
77	136
78	32
79	4
80	7
81	2
82	1
83	1
84	1
85	2