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A144352 as a simple table

n a(n)
0 1
1 1
2 3
3 9
4 36
5 166
6 968
7 6372
8 49368
9 429240
10 4198176
11 45268416
12 535590144
13 6879038400
14 95412176640
15 1419918128640
16 22571960048640
17 381596438638080
18 6836248502784000
19 129352329079142400
20 2577689266340966400
21 53957785094515814400
22 1183674698660605132800

[1,1,3,9,36,166,968,6372,49368,429240,4198176,
 45268416,535590144,6879038400,95412176640,
 1419918128640,22571960048640,381596438638080,
 6836248502784000,129352329079142400,
 2577689266340966400,53957785094515814400,
 1183674698660605132800]

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Last modified July 31 03:28 EDT 2021. Contains 346367 sequences. (Running on oeis4.)