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A297397 as a simple table

n a(n)
1 1
2 20
3 57
4 126
5 700
6 2569
7 7779
8 31081
9 117084
10 400727
11 1478944
12 5485580
13 19599269
14 71231855
15 261062287
16 945122754
17 3430304343
18 12504256178
19 45424857782
20 164983194009
21 600231458537
22 2182009835511
23 7929300624520
24 28830589829675

[1,20,57,126,700,2569,7779,31081,117084,400727,
 1478944,5485580,19599269,71231855,261062287,
 945122754,3430304343,12504256178,45424857782,
 164983194009,600231458537,2182009835511,
 7929300624520,28830589829675]

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Last modified December 9 10:59 EST 2022. Contains 358700 sequences. (Running on oeis4.)