A305565 - cp's OEIS frontend

A305565 Regular triangle where T(n,k) is the number of finite sets of positive integers with least common multiple n and greatest common divisor k.

n	a(n)
1	1
2	1
3	1
4	1
5	0
6	1
7	2
8	1
9	0
10	1
11	1
12	0
13	0
14	0
15	1
16	7
17	1
18	1
19	0
20	0
21	1
22	1
23	0
24	0
25	0
26	0
27	0
28	1
29	4
30	2
31	0
32	1
33	0
34	0
35	0
36	1
37	2
38	0
39	1
40	0
41	0
42	0
43	0
44	0
45	1
46	7
47	1
48	0
49	0
50	1
51	0
52	0
53	0
54	0
55	1
56	1
57	0
58	0
59	0
60	0
61	0
62	0
63	0
64	0
65	0
66	1
67	32
68	7
69	2
70	1
71	0
72	1
73	0
74	0
75	0
76	0
77	0
78	1
79	1
80	0
81	0
82	0
83	0
84	0
85	0
86	0
87	0

[1, 1, 1, 1, 0, 1, 2, 1, 0, 1, 1, 0, 0, 0, 1, 7, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 4, 2, 0, 1, 0, 0, 0, 1, 2, 0, 1, 0, 0, 0, 0, 0, 1, 7, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 32, 7, 2, 1, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0]

cp's OEIS Frontend

A305565 Regular triangle where T(n,k) is the number of finite sets of positive integers with least common multiple n and greatest common divisor k.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	0
6	1
7	2
8	1
9	0
10	1
11	1
12	0
13	0
14	0
15	1
16	7
17	1
18	1
19	0
20	0
21	1
22	1
23	0
24	0
25	0
26	0
27	0
28	1
29	4
30	2
31	0
32	1
33	0
34	0
35	0
36	1
37	2
38	0
39	1
40	0
41	0
42	0
43	0
44	0
45	1
46	7
47	1
48	0
49	0
50	1
51	0
52	0
53	0
54	0
55	1
56	1
57	0
58	0
59	0
60	0
61	0
62	0
63	0
64	0
65	0
66	1
67	32
68	7
69	2
70	1
71	0
72	1
73	0
74	0
75	0
76	0
77	0
78	1
79	1
80	0
81	0
82	0
83	0
84	0
85	0
86	0
87	0

n	a(n)
1	1
2	1
3	1
4	1
5	0
6	1
7	2
8	1
9	0
10	1
11	1
12	0
13	0
14	0
15	1
16	7
17	1
18	1
19	0
20	0
21	1
22	1
23	0
24	0
25	0
26	0
27	0
28	1
29	4
30	2
31	0
32	1
33	0
34	0
35	0
36	1
37	2
38	0
39	1
40	0
41	0
42	0
43	0
44	0
45	1
46	7
47	1
48	0
49	0
50	1
51	0
52	0
53	0
54	0
55	1
56	1
57	0
58	0
59	0
60	0
61	0
62	0
63	0
64	0
65	0
66	1
67	32
68	7
69	2
70	1
71	0
72	1
73	0
74	0
75	0
76	0
77	0
78	1
79	1
80	0
81	0
82	0
83	0
84	0
85	0
86	0
87	0

n	a(n)
1	1
2	1
3	1
4	1
5	0
6	1
7	2
8	1
9	0
10	1
11	1
12	0
13	0
14	0
15	1
16	7
17	1
18	1
19	0
20	0
21	1
22	1
23	0
24	0
25	0
26	0
27	0
28	1
29	4
30	2
31	0
32	1
33	0
34	0
35	0
36	1
37	2
38	0
39	1
40	0
41	0
42	0
43	0
44	0
45	1
46	7
47	1
48	0
49	0
50	1
51	0
52	0
53	0
54	0
55	1
56	1
57	0
58	0
59	0
60	0
61	0
62	0
63	0
64	0
65	0
66	1
67	32
68	7
69	2
70	1
71	0
72	1
73	0
74	0
75	0
76	0
77	0
78	1
79	1
80	0
81	0
82	0
83	0
84	0
85	0
86	0
87	0