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A367780 as a simple table

n a(n)
0 0
1 1
2 20
3 189
4 1356
5 8426
6 47944
7 257085
8 1321036
9 6574190
10 31911320
11 151841906
12 710828600
13 3282862644
14 14988894992
15 67769474077
16 303823057164
17 1352059744070
18 5977826290936
19 26277396651558
20 114916296684008
21 500229317398156
22 2168403190878960
23 9364025672275634

[0,1,20,189,1356,8426,47944,257085,1321036,
 6574190,31911320,151841906,710828600,3282862644,
 14988894992,67769474077,303823057164,
 1352059744070,5977826290936,26277396651558,
 114916296684008,500229317398156,2168403190878960,
 9364025672275634]

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Last modified May 26 23:01 EDT 2024. Contains 372847 sequences. (Running on oeis4.)