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A089888 as a simple table

n a(n)
1 1
2 2
3 4
4 12
5 24
6 48
7 96
8 192
9 448
10 896
11 1792
12 3584
13 7168
14 14336
15 28672
16 61440
17 122880
18 245760
19 491520
20 983040
21 1966080
22 3932160
23 7864320
24 15728640
25 32505856
26 65011712
27 130023424
28 260046848
29 520093696
30 1040187392

[1,2,4,12,24,48,96,192,448,896,1792,3584,7168,
 14336,28672,61440,122880,245760,491520,983040,
 1966080,3932160,7864320,15728640,32505856,
 65011712,130023424,260046848,520093696,1040187392]

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Last modified November 20 05:07 EST 2019. Contains 329323 sequences. (Running on oeis4.)