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A168057 as a simple table

n a(n)
0 1
1 2
2 12
3 40
4 80
5 224
6 576
7 1152
8 2816
9 6656
10 13312
11 30720
12 69632
13 139264
14 311296
15 688128
16 1376256
17 3014656
18 6553600
19 13107200
20 28311552
21 60817408
22 121634816
23 260046848
24 553648128
25 1107296256
26 2348810240
27 4966055936
28 9932111872

[1,2,12,40,80,224,576,1152,2816,6656,13312,30720,
 69632,139264,311296,688128,1376256,3014656,
 6553600,13107200,28311552,60817408,121634816,
 260046848,553648128,1107296256,2348810240,
 4966055936,9932111872]

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Last modified March 8 07:58 EST 2021. Contains 341941 sequences. (Running on oeis4.)