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A076625 as a simple table

n a(n)
1 2
2 8
3 40
4 208
5 1200
6 6528
7 34048
8 196608
9 1112064
10 6062080
11 33701888
12 194871296
13 1091371008
14 5950930944
15 34801188864
16 198474465280
17 1105056497664
18 6298980581376
19 36394596564992
20 205774030635008
21 1151529050439680

[2,8,40,208,1200,6528,34048,196608,1112064,
 6062080,33701888,194871296,1091371008,5950930944,
 34801188864,198474465280,1105056497664,
 6298980581376,36394596564992,205774030635008,
 1151529050439680]

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Last modified February 16 21:46 EST 2020. Contains 331975 sequences. (Running on oeis4.)