A175147 - OEIS

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A175147 as a simple table

n	a(n)
0	0
1	0
2	1
3	2
4	3
5	3
6	5
7	9
8	11
9	18
10	32
11	51
12	84
13	151
14	254
15	429
16	754
17	1311
18	2377
19	4199
20	7584
21	13785
22	24955
23	45840
24	84002
25	153515
26	283659
27	524648
28	976217
29	1817659
30	3392835
31	6348677
32	11898310

[0,0,1,2,3,3,5,9,11,18,32,51,84,151,254,429,754, 1311,2377,4199,7584,13785,24955,45840,84002, 153515,283659,524648,976217,1817659,3392835, 6348677,11898310]