A196721 - cp's OEIS frontend

A196721 Number of subsets of {1..n} (including empty set) such that the pairwise LCMs of elements are all distinct.

n	a(n)
0	1
1	2
2	4
3	8
4	14
5	28
6	42
7	84
8	132
9	236
10	352
11	704
12	920
13	1840
14	2736
15	3816
16	5700
17	11400
18	15384
19	30768
20	39552
21	54656
22	81672
23	163344
24	196176
25	362656
26	542304
27	930352
28	1195168
29	2390336
30	2914304
31	5828608
32	8513920
33	11674848
34	17490432
35	23484224
36	28058816
37	56117632
38	84100800

[1, 2, 4, 8, 14, 28, 42, 84, 132, 236, 352, 704, 920, 1840, 2736, 3816, 5700, 11400, 15384, 30768, 39552, 54656, 81672, 163344, 196176, 362656, 542304, 930352, 1195168, 2390336, 2914304, 5828608, 8513920, 11674848, 17490432, 23484224, 28058816, 56117632, 84100800]

cp's OEIS Frontend

A196721 Number of subsets of {1..n} (including empty set) such that the pairwise LCMs of elements are all distinct.

Table of values

List of values