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A147957 as a simple table

n a(n)
0 1
1 6
2 38
3 252
4 1732
5 12216
6 87704
7 637104
8 4663312
9 34298208
10 253025888
11 1870171584
12 13839178816
13 102484311936
14 759279663488
15 5626889356032
16 41707163713792
17 309171726460416
18 2292017151256064
19 16992367115418624
20 125979822242317312
21 934017384983574528
22 6924894663564105728

[1,6,38,252,1732,12216,87704,637104,4663312,
 34298208,253025888,1870171584,13839178816,
 102484311936,759279663488,5626889356032,
 41707163713792,309171726460416,2292017151256064,
 16992367115418624,125979822242317312,
 934017384983574528,6924894663564105728]

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Last modified April 19 13:40 EDT 2024. Contains 371792 sequences. (Running on oeis4.)