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A297820 as a simple table

n a(n)
1 3
2 166
3 399
4 1395
5 4444
6 14237
7 43931
8 134395
9 412427
10 1268252
11 3904488
12 12035011
13 37073205
14 114147345
15 351479919
16 1082415552
17 3333611748
18 10266940149
19 31619860897
20 97381441665
21 299912849035
22 923670230344
23 2844725104582

[3,166,399,1395,4444,14237,43931,134395,412427,
 1268252,3904488,12035011,37073205,114147345,
 351479919,1082415552,3333611748,10266940149,
 31619860897,97381441665,299912849035,923670230344,
 2844725104582]

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Last modified January 16 22:12 EST 2022. Contains 350376 sequences. (Running on oeis4.)