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A151478 as a simple table

n a(n)
0 1
1 1
2 4
3 12
4 54
5 210
6 1020
7 4445
8 22610
9 105210
10 551376
11 2678676
12 14332164
13 71788860
14 389991888
15 1998530820
16 10984120290
17 57293297490
18 317798892840
19 1681213457352
20 9395215622364
21 50278804820244
22 282711201927336
23 1527524202392370
24 8633634028624332
25 47028406025950300
26 266981514041485600

[1,1,4,12,54,210,1020,4445,22610,105210,551376,
 2678676,14332164,71788860,389991888,1998530820,
 10984120290,57293297490,317798892840,
 1681213457352,9395215622364,50278804820244,
 282711201927336,1527524202392370,8633634028624332,
 47028406025950300,266981514041485600]

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Last modified March 4 14:06 EST 2024. Contains 370532 sequences. (Running on oeis4.)