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A208841 as a simple table

n a(n)
1 9
2 81
3 171
4 855
5 2421
6 9801
7 31419
8 116919
9 394965
10 1419849
11 4902939
12 17375031
13 60551541
14 213310665
15 746231931
16 2622329271
17 9188418069
18 32255749449
19 113096449755
20 396852637239
21 1391845926069
22 4883081614281
23 17127968887611

[9,81,171,855,2421,9801,31419,116919,394965,
 1419849,4902939,17375031,60551541,213310665,
 746231931,2622329271,9188418069,32255749449,
 113096449755,396852637239,1391845926069,
 4883081614281,17127968887611]

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Last modified February 6 11:28 EST 2023. Contains 360104 sequences. (Running on oeis4.)