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A077994
as a simple table
n
a(n)
0
1
1
1
2
4
3
12
4
34
5
100
6
292
7
852
8
2488
9
7264
10
21208
11
61920
12
180784
13
527824
14
1541056
15
4499328
[1,1,4,12,34,100,292,852,2488,7264,21208,61920, 180784,527824,1541056,4499328]
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Last modified April 24 10:11 EDT 2024. Contains 371935 sequences. (Running on oeis4.)