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A208160 as a simple table

n a(n)
1 9
2 81
3 281
4 981
5 3893
6 13825
7 46611
8 159545
9 538479
10 1783379
11 5887303
12 19371713
13 63378811
14 206749703
15 673357733
16 2188957835
17 7106004543
18 23048741587
19 74706706363
20 242002483927
21 783622093421
22 2536664872659
23 8209475506107

[9,81,281,981,3893,13825,46611,159545,538479,
 1783379,5887303,19371713,63378811,206749703,
 673357733,2188957835,7106004543,23048741587,
 74706706363,242002483927,783622093421,
 2536664872659,8209475506107]

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Last modified December 4 23:46 EST 2022. Contains 358572 sequences. (Running on oeis4.)