A224543 - OEIS

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A224543 as a simple table

n	a(n)
1	8
2	32
3	78
4	196
5	428
6	916
7	1858
8	3678
9	7096
10	13458
11	25150
12	46466
13	85028
14	154356
15	278298
16	498792
17	889320
18	1578248
19	2789166
20	4910498
21	8615348
22	15067462
23	26274538
24	45693286

[8,32,78,196,428,916,1858,3678,7096,13458,25150, 46466,85028,154356,278298,498792,889320,1578248, 2789166,4910498,8615348,15067462,26274538, 45693286]