A187265 - cp's OEIS frontend

A187265 Number of nonempty subsets of {1, 2, ..., n} with <= 4 pairwise coprime elements.

n	a(n)
1	1
2	3
3	7
4	11
5	23
6	27
7	53
8	68
9	97
10	109
11	193
12	208
13	345
14	382
15	437
16	506
17	785
18	827
19	1224
20	1310
21	1472
22	1590
23	2253
24	2346
25	2892
26	3100
27	3568
28	3784
29	5070
30	5163
31	6756
32	7277
33	7928
34	8387
35	9301
36	9560
37	12142
38	12790
39	13815
40	14297
41	17795
42	18083
43	22189

[1, 3, 7, 11, 23, 27, 53, 68, 97, 109, 193, 208, 345, 382, 437, 506, 785, 827, 1224, 1310, 1472, 1590, 2253, 2346, 2892, 3100, 3568, 3784, 5070, 5163, 6756, 7277, 7928, 8387, 9301, 9560, 12142, 12790, 13815, 14297, 17795, 18083, 22189]

cp's OEIS Frontend

A187265 Number of nonempty subsets of {1, 2, ..., n} with <= 4 pairwise coprime elements.

Table of values

List of values