A370588 - cp's OEIS frontend

A370588 Number of subsets of {1..n} containing n such that only one set can be obtained by choosing a different prime factor of each element.

n	a(n)
0	0
1	0
2	1
3	2
4	2
5	6
6	6
7	18
8	12
9	20
10	36
11	104
12	76
13	284
14	320
15	408
16	252
17	1548
18	872
19	3968
20	2800
21	4704
22	8568
23	24008
24	10832
25	14832
26	40688
27	18240
28	43632
29	176240
30	97344
31	449824
32	95328
33	404992
34	760752
35	698864
36	436464
37	3296048
38	3564576
39	4057904
40	2677776
41	16892352
42	8676576

[0, 0, 1, 2, 2, 6, 6, 18, 12, 20, 36, 104, 76, 284, 320, 408, 252, 1548, 872, 3968, 2800, 4704, 8568, 24008, 10832, 14832, 40688, 18240, 43632, 176240, 97344, 449824, 95328, 404992, 760752, 698864, 436464, 3296048, 3564576, 4057904, 2677776, 16892352, 8676576]

cp's OEIS Frontend

A370588 Number of subsets of {1..n} containing n such that only one set can be obtained by choosing a different prime factor of each element.

Table of values

List of values