A355145 - cp's OEIS frontend

A355145 Triangle read by rows: T(n,k) is the number of primitive subsets of {1,...,n} of cardinality k; n>=0, 0<=k<=ceiling(n/2).

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	3
7	1
8	1
9	4
10	2
11	1
12	5
13	5
14	2
15	1
16	6
17	7
18	3
19	1
20	7
21	12
22	10
23	3
24	1
25	8
26	16
27	15
28	5
29	1
30	9
31	22
32	26
33	13
34	2
35	1
36	10
37	28
38	38
39	22
40	4
41	1
42	11
43	37
44	66
45	60
46	26
47	4
48	1
49	12
50	43
51	80
52	76
53	35
54	6
55	1
56	13
57	54
58	123
59	156
60	111
61	41
62	6
63	1
64	14
65	64
66	161
67	227
68	180
69	74
70	12

[1, 1, 1, 1, 2, 1, 3, 1, 1, 4, 2, 1, 5, 5, 2, 1, 6, 7, 3, 1, 7, 12, 10, 3, 1, 8, 16, 15, 5, 1, 9, 22, 26, 13, 2, 1, 10, 28, 38, 22, 4, 1, 11, 37, 66, 60, 26, 4, 1, 12, 43, 80, 76, 35, 6, 1, 13, 54, 123, 156, 111, 41, 6, 1, 14, 64, 161, 227, 180, 74, 12]

cp's OEIS Frontend

A355145 Triangle read by rows: T(n,k) is the number of primitive subsets of {1,...,n} of cardinality k; n>=0, 0<=k<=ceiling(n/2).

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	1
9	4
10	2
11	1
12	5
13	5
14	2
15	1
16	6
17	7
18	3
19	1
20	7
21	12
22	10
23	3
24	1
25	8
26	16
27	15
28	5
29	1
30	9
31	22
32	26
33	13
34	2
35	1
36	10
37	28
38	38
39	22
40	4
41	1
42	11
43	37
44	66
45	60
46	26
47	4
48	1
49	12
50	43
51	80
52	76
53	35
54	6
55	1
56	13
57	54
58	123
59	156
60	111
61	41
62	6
63	1
64	14
65	64
66	161
67	227
68	180
69	74
70	12

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	3
7	1
8	1
9	4
10	2
11	1
12	5
13	5
14	2
15	1
16	6
17	7
18	3
19	1
20	7
21	12
22	10
23	3
24	1
25	8
26	16
27	15
28	5
29	1
30	9
31	22
32	26
33	13
34	2
35	1
36	10
37	28
38	38
39	22
40	4
41	1
42	11
43	37
44	66
45	60
46	26
47	4
48	1
49	12
50	43
51	80
52	76
53	35
54	6
55	1
56	13
57	54
58	123
59	156
60	111
61	41
62	6
63	1
64	14
65	64
66	161
67	227
68	180
69	74
70	12

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	3
7	1
8	1
9	4
10	2
11	1
12	5
13	5
14	2
15	1
16	6
17	7
18	3
19	1
20	7
21	12
22	10
23	3
24	1
25	8
26	16
27	15
28	5
29	1
30	9
31	22
32	26
33	13
34	2
35	1
36	10
37	28
38	38
39	22
40	4
41	1
42	11
43	37
44	66
45	60
46	26
47	4
48	1
49	12
50	43
51	80
52	76
53	35
54	6
55	1
56	13
57	54
58	123
59	156
60	111
61	41
62	6
63	1
64	14
65	64
66	161
67	227
68	180
69	74
70	12