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A115148 as a simple table

n a(n)
0 1
1 -9
2 27
3 -30
4 9
5 0
6 0
7 0
8 0
9 -1
10 -9
11 -54
12 -273
13 -1260
14 -5508
15 -23256
16 -95931
17 -389367
18 -1562275
19 -6216210
20 -24582285
21 -96768360
22 -379629720
23 -1485507600
24 -5801732460
25 -22626756594
26 -88152205554
27 -343176898988
28 -1335293573130
29 -5193831553416

[1,-9,27,-30,9,0,0,0,0,-1,-9,-54,-273,-1260,-5508,
 -23256,-95931,-389367,-1562275,-6216210,-24582285,
 -96768360,-379629720,-1485507600,-5801732460,
 -22626756594,-88152205554,-343176898988,
 -1335293573130,-5193831553416]

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Last modified June 23 21:09 EDT 2021. Contains 345402 sequences. (Running on oeis4.)