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A038783 as a simple table

n a(n)
1 4
2 10
3 24
4 208
5 700
6 8230
7 29144
8 381304
9 19175140
10 71582944
11 3817763740
12 54975633976
13 209430787824
14 3059510616424
15 173215372864600
16 9938978487990064
17 38430716856090160
18 2235968978631715024
19 33731189163354610720
20 131176846748288854980
21 7749524484709164817824

[4,10,24,208,700,8230,29144,381304,19175140,
 71582944,3817763740,54975633976,209430787824,
 3059510616424,173215372864600,9938978487990064,
 38430716856090160,2235968978631715024,
 33731189163354610720,131176846748288854980,
 7749524484709164817824]

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Last modified August 9 18:55 EDT 2022. Contains 356026 sequences. (Running on oeis4.)