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A045768
as a simple table
n
a(n)
1
1
2
20
3
104
4
464
5
650
6
1952
7
130304
8
522752
9
8382464
10
134193152
11
549754241024
12
8796086730752
13
140737463189504
[1,20,104,464,650,1952,130304,522752,8382464, 134193152,549754241024,8796086730752, 140737463189504]
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Last modified April 23 18:16 EDT 2024. Contains 371916 sequences. (Running on oeis4.)