A187092 - cp's OEIS frontend

A187092 Number of nonempty subsets S of {1, 2, ..., n} with pairwise coprime elements that are maximal with respect to inclusion of elements < max(S).

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	7
7	9
8	10
9	13
10	15
11	21
12	22
13	28
14	30
15	33
16	35
17	43
18	44
19	52
20	54
21	58
22	60
23	68
24	69
25	77
26	81
27	89
28	95
29	119
30	120
31	144
32	150
33	160
34	166
35	181
36	183
37	213
38	219
39	229
40	232
41	262
42	264
43	294
44	300
45	305
46	311
47	341
48	343
49	373
50	379
51	399
52	411
53	471
54	475
55	505
56	511
57	531

[1, 2, 3, 4, 6, 7, 9, 10, 13, 15, 21, 22, 28, 30, 33, 35, 43, 44, 52, 54, 58, 60, 68, 69, 77, 81, 89, 95, 119, 120, 144, 150, 160, 166, 181, 183, 213, 219, 229, 232, 262, 264, 294, 300, 305, 311, 341, 343, 373, 379, 399, 411, 471, 475, 505, 511, 531]

cp's OEIS Frontend

A187092 Number of nonempty subsets S of {1, 2, ..., n} with pairwise coprime elements that are maximal with respect to inclusion of elements < max(S).

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	7
7	9
8	10
9	13
10	15
11	21
12	22
13	28
14	30
15	33
16	35
17	43
18	44
19	52
20	54
21	58
22	60
23	68
24	69
25	77
26	81
27	89
28	95
29	119
30	120
31	144
32	150
33	160
34	166
35	181
36	183
37	213
38	219
39	229
40	232
41	262
42	264
43	294
44	300
45	305
46	311
47	341
48	343
49	373
50	379
51	399
52	411
53	471
54	475
55	505
56	511
57	531

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	7
7	9
8	10
9	13
10	15
11	21
12	22
13	28
14	30
15	33
16	35
17	43
18	44
19	52
20	54
21	58
22	60
23	68
24	69
25	77
26	81
27	89
28	95
29	119
30	120
31	144
32	150
33	160
34	166
35	181
36	183
37	213
38	219
39	229
40	232
41	262
42	264
43	294
44	300
45	305
46	311
47	341
48	343
49	373
50	379
51	399
52	411
53	471
54	475
55	505
56	511
57	531

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	7
7	9
8	10
9	13
10	15
11	21
12	22
13	28
14	30
15	33
16	35
17	43
18	44
19	52
20	54
21	58
22	60
23	68
24	69
25	77
26	81
27	89
28	95
29	119
30	120
31	144
32	150
33	160
34	166
35	181
36	183
37	213
38	219
39	229
40	232
41	262
42	264
43	294
44	300
45	305
46	311
47	341
48	343
49	373
50	379
51	399
52	411
53	471
54	475
55	505
56	511
57	531