A187489 - cp's OEIS frontend

A187489 Irregular triangle T(n,k), n>=0, 0<=k<=A068063(n), read by rows: T(n,k) is the number of k-element nondividing subsets of {1, 2, ..., n}.

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	1
15	6
16	7
17	1
18	7
19	12
20	1
21	1
22	8
23	16
24	2
25	1
26	9
27	22
28	6
29	1
30	10
31	28
32	12
33	1
34	1
35	11
36	37
37	22
38	2
39	1
40	12
41	43
42	31
43	3
44	1
45	13
46	54
47	49
48	6
49	1
50	14
51	64
52	70
53	10
54	1
55	15
56	75
57	99
58	21
59	1
60	16
61	86
62	128
63	32
64	1
65	17
66	101
67	176
68	49
69	1
70	18
71	113
72	216
73	65
74	1
75	19
76	130
77	284
78	101

[1, 1, 1, 1, 2, 1, 3, 1, 1, 4, 2, 1, 5, 5, 1, 6, 7, 1, 7, 12, 1, 1, 8, 16, 2, 1, 9, 22, 6, 1, 10, 28, 12, 1, 1, 11, 37, 22, 2, 1, 12, 43, 31, 3, 1, 13, 54, 49, 6, 1, 14, 64, 70, 10, 1, 15, 75, 99, 21, 1, 16, 86, 128, 32, 1, 17, 101, 176, 49, 1, 18, 113, 216, 65, 1, 19, 130, 284, 101]

cp's OEIS Frontend

A187489 Irregular triangle T(n,k), n>=0, 0<=k<=A068063(n), read by rows: T(n,k) is the number of k-element nondividing subsets of {1, 2, ..., n}.

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	1
15	6
16	7
17	1
18	7
19	12
20	1
21	1
22	8
23	16
24	2
25	1
26	9
27	22
28	6
29	1
30	10
31	28
32	12
33	1
34	1
35	11
36	37
37	22
38	2
39	1
40	12
41	43
42	31
43	3
44	1
45	13
46	54
47	49
48	6
49	1
50	14
51	64
52	70
53	10
54	1
55	15
56	75
57	99
58	21
59	1
60	16
61	86
62	128
63	32
64	1
65	17
66	101
67	176
68	49
69	1
70	18
71	113
72	216
73	65
74	1
75	19
76	130
77	284
78	101

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	1
15	6
16	7
17	1
18	7
19	12
20	1
21	1
22	8
23	16
24	2
25	1
26	9
27	22
28	6
29	1
30	10
31	28
32	12
33	1
34	1
35	11
36	37
37	22
38	2
39	1
40	12
41	43
42	31
43	3
44	1
45	13
46	54
47	49
48	6
49	1
50	14
51	64
52	70
53	10
54	1
55	15
56	75
57	99
58	21
59	1
60	16
61	86
62	128
63	32
64	1
65	17
66	101
67	176
68	49
69	1
70	18
71	113
72	216
73	65
74	1
75	19
76	130
77	284
78	101

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	1
15	6
16	7
17	1
18	7
19	12
20	1
21	1
22	8
23	16
24	2
25	1
26	9
27	22
28	6
29	1
30	10
31	28
32	12
33	1
34	1
35	11
36	37
37	22
38	2
39	1
40	12
41	43
42	31
43	3
44	1
45	13
46	54
47	49
48	6
49	1
50	14
51	64
52	70
53	10
54	1
55	15
56	75
57	99
58	21
59	1
60	16
61	86
62	128
63	32
64	1
65	17
66	101
67	176
68	49
69	1
70	18
71	113
72	216
73	65
74	1
75	19
76	130
77	284
78	101