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A207238 as a simple table

n a(n)
1 9
2 81
3 283
4 987
5 3866
6 13494
7 44730
8 150608
9 498551
10 1615388
11 5213924
12 16743300
13 53330410
14 169085209
15 534330613
16 1682097877
17 5278749205
18 16525845242
19 51617974464
20 160893899363
21 500630178086
22 1555278833939
23 4824719777577

[9,81,283,987,3866,13494,44730,150608,498551,
 1615388,5213924,16743300,53330410,169085209,
 534330613,1682097877,5278749205,16525845242,
 51617974464,160893899363,500630178086,
 1555278833939,4824719777577]

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Last modified September 29 06:25 EDT 2022. Contains 357082 sequences. (Running on oeis4.)