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A099176 as a simple table

n a(n)
0 1
1 1
2 4
3 8
4 24
5 60
6 168
7 448
8 1232
9 3344
10 9152
11 24960
12 68224
13 186304
14 509056
15 1390592
16 3799296
17 10379520
18 28357632
19 77473792
20 211662848
21 578272256
22 1579870208
23 4316282880
24 11792306176
25 32217174016
26 88018960384
27 240472260608

[1,1,4,8,24,60,168,448,1232,3344,9152,24960,68224,
 186304,509056,1390592,3799296,10379520,28357632,
 77473792,211662848,578272256,1579870208,
 4316282880,11792306176,32217174016,88018960384,
 240472260608]

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Last modified May 25 20:58 EDT 2020. Contains 334597 sequences. (Running on oeis4.)