A068060 - cp's OEIS frontend

A068060 Number of subsets of {1, 2, ..., n} that do not contain a subset of the form {x, 2x, 3x}.

n	a(n)
0	1
1	2
2	4
3	7
4	14
5	28
6	50
7	100
8	200
9	360
10	720
11	1440
12	2560
13	5120
14	10240
15	17920
16	35840
17	71680
18	130816
19	261632
20	523264
21	915712
22	1831424
23	3662848
24	6516608
25	13033216
26	26066432
27	46688768
28	93377536
29	186755072
30	333491200
31	666982400
32	1333964800
33	2334438400
34	4668876800

[1, 2, 4, 7, 14, 28, 50, 100, 200, 360, 720, 1440, 2560, 5120, 10240, 17920, 35840, 71680, 130816, 261632, 523264, 915712, 1831424, 3662848, 6516608, 13033216, 26066432, 46688768, 93377536, 186755072, 333491200, 666982400, 1333964800, 2334438400, 4668876800]

cp's OEIS Frontend

A068060 Number of subsets of {1, 2, ..., n} that do not contain a subset of the form {x, 2x, 3x}.

Table of values

List of values