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A307526 as a simple table

n a(n)
0 1
1 4
2 24
3 144
4 828
5 4624
6 25296
7 136192
8 723160
9 3792564
10 19672240
11 101054512
12 514643952
13 2600665872
14 13049557280
15 65057605120
16 322413671228
17 1589046496704
18 7791836790504
19 38025622117168
20 184749163375664
21 893881787650016
22 4308024769339344
23 20685919693884672

[1,4,24,144,828,4624,25296,136192,723160,3792564,
 19672240,101054512,514643952,2600665872,
 13049557280,65057605120,322413671228,
 1589046496704,7791836790504,38025622117168,
 184749163375664,893881787650016,4308024769339344,
 20685919693884672]

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Last modified April 19 09:23 EDT 2024. Contains 371782 sequences. (Running on oeis4.)