A275545 - OEIS

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A275545 as a simple table

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	1
6	2
7	4
8	8
9	16
10	34
11	67
12	137
13	272
14	540
15	1061
16	2074
17	4022
18	7763
19	14914
20	28556
21	54499
22	103729
23	196945
24	373201
25	705964
26	1333413
27	2515298
28	4739834
29	8926089

[0,0,0,0,1,1,2,4,8,16,34,67,137,272,540,1061,2074, 4022,7763,14914,28556,54499,103729,196945,373201, 705964,1333413,2515298,4739834,8926089]