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A057711 as a simple table

n a(n)
0 0
1 1
2 2
3 6
4 16
5 40
6 96
7 224
8 512
9 1152
10 2560
11 5632
12 12288
13 26624
14 57344
15 122880
16 262144
17 557056
18 1179648
19 2490368
20 5242880
21 11010048
22 23068672
23 48234496
24 100663296
25 209715200
26 436207616
27 905969664
28 1879048192
29 3892314112
30 8053063680

[0,1,2,6,16,40,96,224,512,1152,2560,5632,12288,
 26624,57344,122880,262144,557056,1179648,2490368,
 5242880,11010048,23068672,48234496,100663296,
 209715200,436207616,905969664,1879048192,
 3892314112,8053063680]

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Last modified June 15 22:19 EDT 2019. Contains 324145 sequences. (Running on oeis4.)