A355146 - cp's OEIS frontend

A355146 Triangle read by rows: T(n,k) is the number of subsets of {1,...,n} of cardinality k in which every pair of elements is coprime; n >= 0, 0 <= k <= A036234(n).

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	3
8	3
9	1
10	1
11	4
12	5
13	2
14	1
15	5
16	9
17	7
18	2
19	1
20	6
21	11
22	8
23	2
24	1
25	7
26	17
27	19
28	10
29	2
30	1
31	8
32	21
33	25
34	14
35	3
36	1
37	9
38	27
39	37
40	24
41	6
42	1
43	10
44	31
45	42
46	26
47	6
48	1
49	11
50	41
51	73
52	68
53	32
54	6
55	1
56	12
57	45
58	79
59	72
60	33
61	6
62	1
63	13
64	57
65	124
66	151
67	105
68	39
69	6
70	1
71	14
72	63
73	138
74	167
75	114
76	41
77	6

[1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 4, 5, 2, 1, 5, 9, 7, 2, 1, 6, 11, 8, 2, 1, 7, 17, 19, 10, 2, 1, 8, 21, 25, 14, 3, 1, 9, 27, 37, 24, 6, 1, 10, 31, 42, 26, 6, 1, 11, 41, 73, 68, 32, 6, 1, 12, 45, 79, 72, 33, 6, 1, 13, 57, 124, 151, 105, 39, 6, 1, 14, 63, 138, 167, 114, 41, 6]

cp's OEIS Frontend

A355146 Triangle read by rows: T(n,k) is the number of subsets of {1,...,n} of cardinality k in which every pair of elements is coprime; n >= 0, 0 <= k <= A036234(n).

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	3
8	3
9	1
10	1
11	4
12	5
13	2
14	1
15	5
16	9
17	7
18	2
19	1
20	6
21	11
22	8
23	2
24	1
25	7
26	17
27	19
28	10
29	2
30	1
31	8
32	21
33	25
34	14
35	3
36	1
37	9
38	27
39	37
40	24
41	6
42	1
43	10
44	31
45	42
46	26
47	6
48	1
49	11
50	41
51	73
52	68
53	32
54	6
55	1
56	12
57	45
58	79
59	72
60	33
61	6
62	1
63	13
64	57
65	124
66	151
67	105
68	39
69	6
70	1
71	14
72	63
73	138
74	167
75	114
76	41
77	6

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	3
8	3
9	1
10	1
11	4
12	5
13	2
14	1
15	5
16	9
17	7
18	2
19	1
20	6
21	11
22	8
23	2
24	1
25	7
26	17
27	19
28	10
29	2
30	1
31	8
32	21
33	25
34	14
35	3
36	1
37	9
38	27
39	37
40	24
41	6
42	1
43	10
44	31
45	42
46	26
47	6
48	1
49	11
50	41
51	73
52	68
53	32
54	6
55	1
56	12
57	45
58	79
59	72
60	33
61	6
62	1
63	13
64	57
65	124
66	151
67	105
68	39
69	6
70	1
71	14
72	63
73	138
74	167
75	114
76	41
77	6

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	3
8	3
9	1
10	1
11	4
12	5
13	2
14	1
15	5
16	9
17	7
18	2
19	1
20	6
21	11
22	8
23	2
24	1
25	7
26	17
27	19
28	10
29	2
30	1
31	8
32	21
33	25
34	14
35	3
36	1
37	9
38	27
39	37
40	24
41	6
42	1
43	10
44	31
45	42
46	26
47	6
48	1
49	11
50	41
51	73
52	68
53	32
54	6
55	1
56	12
57	45
58	79
59	72
60	33
61	6
62	1
63	13
64	57
65	124
66	151
67	105
68	39
69	6
70	1
71	14
72	63
73	138
74	167
75	114
76	41
77	6