A358392 - cp's OEIS frontend

A358392 Number of nonempty subsets of {1, 2, ..., n} with GCD equal to 1 and containing the sum of any two elements whenever it is at most n.

n	a(n)
1	1
2	1
3	2
4	3
5	7
6	9
7	19
8	27
9	46
10	63
11	113
12	148
13	253
14	345
15	539
16	734
17	1198
18	1580
19	2540
20	3417
21	5233
22	7095
23	11190
24	14720
25	22988
26	31057
27	47168
28	63331
29	98233
30	129836
31	200689
32	269165
33	406504
34	546700
35	838766
36	1108583
37	1700025
38	2281517
39	3437422
40	4597833
41	7023543
42	9308824
43	14198257
44	18982014
45	28556962

[1, 1, 2, 3, 7, 9, 19, 27, 46, 63, 113, 148, 253, 345, 539, 734, 1198, 1580, 2540, 3417, 5233, 7095, 11190, 14720, 22988, 31057, 47168, 63331, 98233, 129836, 200689, 269165, 406504, 546700, 838766, 1108583, 1700025, 2281517, 3437422, 4597833, 7023543, 9308824, 14198257, 18982014, 28556962]

cp's OEIS Frontend

A358392 Number of nonempty subsets of {1, 2, ..., n} with GCD equal to 1 and containing the sum of any two elements whenever it is at most n.

Table of values

List of values