A209284 - OEIS

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A209284 as a simple table

n	a(n)
1	2
2	2
3	4
4	4
5	10
6	14
7	22
8	32
9	70
10	122
11	178
12	286
13	518
14	898
15	1610
16	2666
17	4702
18	8506
19	14982
20	26668
21	48022
22	85904
23	155102
24	282096
25	514510
26	944036
27	1734736
28	3194838
29	5898576
30	10945970
31	20322550
32	37823268

[2,2,4,4,10,14,22,32,70,122,178,286,518,898,1610, 2666,4702,8506,14982,26668,48022,85904,155102, 282096,514510,944036,1734736,3194838,5898576, 10945970,20322550,37823268]