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A066240 as a simple table

n a(n)
1 18
2 20
3 70
4 104
5 464
6 1952
7 45356
8 91388
9 130304
10 254012
11 388076
12 437745
13 522752
14 8382464
15 134193152 

[18,20,70,104,464,1952,45356,91388,130304,254012,
 388076,437745,522752,8382464,134193152]

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)