A360285 - cp's OEIS frontend

A360285 Triangle read by rows: T(n,k) is the number of subsets of {1,...,n} of cardinality k in which no two elements are coprime; n >= 0, 0 <= k <= floor(n/2) + [n=1].

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

[1, 1, 1, 1, 2, 1, 3, 1, 4, 1, 1, 5, 1, 1, 6, 4, 1, 1, 7, 4, 1, 1, 8, 7, 4, 1, 1, 9, 9, 5, 1, 1, 10, 14, 11, 5, 1, 1, 11, 14, 11, 5, 1, 1, 12, 21, 24, 16, 6, 1, 1, 13, 21, 24, 16, 6, 1, 1, 14, 28, 39, 36, 21, 7, 1, 1, 15, 34, 48, 41, 22, 7, 1, 1, 16, 41, 69, 76, 57, 28, 8, 1]

cp's OEIS Frontend

A360285 Triangle read by rows: T(n,k) is the number of subsets of {1,...,n} of cardinality k in which no two elements are coprime; n >= 0, 0 <= k <= floor(n/2) + [n=1].

Table of values

List of values

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

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

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