A326880 - cp's OEIS frontend

A326880 BII-numbers of set-systems that are closed under nonempty intersection.

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	5
7	6
8	7
9	8
10	9
11	10
12	11
13	12
14	13
15	14
16	15
17	16
18	17
19	18
20	19
21	21
22	23
23	24
24	25
25	26
26	27
27	29
28	31
29	32
30	33
31	34
32	35
33	38
34	39
35	40
36	41
37	42
38	43
39	46
40	47
41	56
42	57
43	58
44	59
45	63
46	64
47	65
48	66
49	67
50	68
51	69
52	70
53	71
54	72
55	73
56	74
57	75
58	76
59	77
60	78
61	79
62	80
63	81
64	82
65	83
66	85
67	87
68	88

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 23, 24, 25, 26, 27, 29, 31, 32, 33, 34, 35, 38, 39, 40, 41, 42, 43, 46, 47, 56, 57, 58, 59, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 85, 87, 88]

cp's OEIS Frontend

A326880 BII-numbers of set-systems that are closed under nonempty intersection.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	5
7	6
8	7
9	8
10	9
11	10
12	11
13	12
14	13
15	14
16	15
17	16
18	17
19	18
20	19
21	21
22	23
23	24
24	25
25	26
26	27
27	29
28	31
29	32
30	33
31	34
32	35
33	38
34	39
35	40
36	41
37	42
38	43
39	46
40	47
41	56
42	57
43	58
44	59
45	63
46	64
47	65
48	66
49	67
50	68
51	69
52	70
53	71
54	72
55	73
56	74
57	75
58	76
59	77
60	78
61	79
62	80
63	81
64	82
65	83
66	85
67	87
68	88

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	5
7	6
8	7
9	8
10	9
11	10
12	11
13	12
14	13
15	14
16	15
17	16
18	17
19	18
20	19
21	21
22	23
23	24
24	25
25	26
26	27
27	29
28	31
29	32
30	33
31	34
32	35
33	38
34	39
35	40
36	41
37	42
38	43
39	46
40	47
41	56
42	57
43	58
44	59
45	63
46	64
47	65
48	66
49	67
50	68
51	69
52	70
53	71
54	72
55	73
56	74
57	75
58	76
59	77
60	78
61	79
62	80
63	81
64	82
65	83
66	85
67	87
68	88

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	5
7	6
8	7
9	8
10	9
11	10
12	11
13	12
14	13
15	14
16	15
17	16
18	17
19	18
20	19
21	21
22	23
23	24
24	25
25	26
26	27
27	29
28	31
29	32
30	33
31	34
32	35
33	38
34	39
35	40
36	41
37	42
38	43
39	46
40	47
41	56
42	57
43	58
44	59
45	63
46	64
47	65
48	66
49	67
50	68
51	69
52	70
53	71
54	72
55	73
56	74
57	75
58	76
59	77
60	78
61	79
62	80
63	81
64	82
65	83
66	85
67	87
68	88