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A173559 as a simple table

n a(n)
0 1
1 -6
2 -13
3 -27
4 -50
5 -106
6 -208
7 -412
8 -840
9 -1656
10 -3328
11 -6672
12 -13280
13 -26656
14 -53248
15 -106432
16 -213120
17 -425856
18 -851968
19 -1704192
20 -3407360
21 -6816256
22 -13631488
23 -27261952
24 -54528000
25 -109049856
26 -218103808
27 -436211712
28 -872407040
29 -1744838656

[1,-6,-13,-27,-50,-106,-208,-412,-840,-1656,-3328,
 -6672,-13280,-26656,-53248,-106432,-213120,
 -425856,-851968,-1704192,-3407360,-6816256,
 -13631488,-27261952,-54528000,-109049856,
 -218103808,-436211712,-872407040,-1744838656]

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Last modified July 29 14:59 EDT 2021. Contains 346346 sequences. (Running on oeis4.)