A187264 - cp's OEIS frontend

A187264 Number of nonempty subsets of {1, 2, ..., n} with <=3 pairwise coprime elements.

n	a(n)
1	1
2	3
3	7
4	11
5	21
6	25
7	43
8	54
9	73
10	83
11	125
12	136
13	194
14	215
15	245
16	278
17	374
18	396
19	516
20	552
21	614
22	662
23	834
24	871
25	1018
26	1087
27	1215
28	1285
29	1555
30	1592
31	1900
32	2023
33	2181
34	2298
35	2506
36	2581
37	3013
38	3160
39	3378
40	3497
41	4027
42	4105
43	4689
44	4875
45	5103

[1, 3, 7, 11, 21, 25, 43, 54, 73, 83, 125, 136, 194, 215, 245, 278, 374, 396, 516, 552, 614, 662, 834, 871, 1018, 1087, 1215, 1285, 1555, 1592, 1900, 2023, 2181, 2298, 2506, 2581, 3013, 3160, 3378, 3497, 4027, 4105, 4689, 4875, 5103]

cp's OEIS Frontend

A187264 Number of nonempty subsets of {1, 2, ..., n} with <=3 pairwise coprime elements.

Table of values

List of values