A209410 - cp's OEIS frontend

A209410 Number of subsets of {1,...,n} not containing {a,a+2,a+4} for any a.

n	a(n)
0	1
1	2
2	4
3	8
4	16
5	28
6	49
7	91
8	169
9	312
10	576
11	1056
12	1936
13	3564
14	6561
15	12069
16	22201
17	40826
18	75076
19	138096
20	254016
21	467208
22	859329
23	1580535
24	2907025
25	5346880
26	9834496
27	18088448
28	33269824
29	61192712
30	112550881
31	207013417
32	380757169
33	700321570
34	1288092100

[1, 2, 4, 8, 16, 28, 49, 91, 169, 312, 576, 1056, 1936, 3564, 6561, 12069, 22201, 40826, 75076, 138096, 254016, 467208, 859329, 1580535, 2907025, 5346880, 9834496, 18088448, 33269824, 61192712, 112550881, 207013417, 380757169, 700321570, 1288092100]

cp's OEIS Frontend

A209410 Number of subsets of {1,...,n} not containing {a,a+2,a+4} for any a.

Table of values

List of values