A214448 - OEIS

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A214448 as a simple table

n	a(n)
1	1
2	2
3	2
4	3
5	4
6	6
7	9
8	15
9	25
10	44
11	80
12	148
13	281
14	544
15	1070
16	2139
17	4343
18	8946
19	18676
20	39495
21	84545
22	183102
23	400981
24	887517
25	1984548
26	4481308
27	10215173
28	23498233
29	54529901
30	127618907
31	301130984
32	716214216

[1,2,2,3,4,6,9,15,25,44,80,148,281,544,1070,2139, 4343,8946,18676,39495,84545,183102,400981,887517, 1984548,4481308,10215173,23498233,54529901, 127618907,301130984,716214216]