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A080929 as a simple table

n a(n)
0 1
1 3
2 12
3 40
4 120
5 336
6 896
7 2304
8 5760
9 14080
10 33792
11 79872
12 186368
13 430080
14 983040
15 2228224
16 5013504
17 11206656
18 24903680
19 55050240
20 121110528
21 265289728
22 578813952
23 1258291200
24 2726297600
25 5888802816
26 12683575296
27 27246198784

[1,3,12,40,120,336,896,2304,5760,14080,33792,
 79872,186368,430080,983040,2228224,5013504,
 11206656,24903680,55050240,121110528,265289728,
 578813952,1258291200,2726297600,5888802816,
 12683575296,27246198784]

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Last modified July 15 16:09 EDT 2019. Contains 325049 sequences. (Running on oeis4.)