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A109475 as a simple table

n a(n)
0 1
1 0
2 0
3 24
4 15
5 24
6 -288
7 -360
8 -688
9 6552
10 12672
11 28824
12 -179760
13 -489576
14 -1302048
15 5217048
16 19526032
17 60278040
18 -148068864
19 -784538856
20 -2808829296
21 3690331416
22 31279327200
23 130628742552
24 -54844246832
25 -1220948555112
26 -6032746152576
27 -1938148274280
28 45890479702608

[1,0,0,24,15,24,-288,-360,-688,6552,12672,28824,
 -179760,-489576,-1302048,5217048,19526032,
 60278040,-148068864,-784538856,-2808829296,
 3690331416,31279327200,130628742552,-54844246832,
 -1220948555112,-6032746152576,-1938148274280,
 45890479702608]

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Last modified January 27 22:45 EST 2022. Contains 350654 sequences. (Running on oeis4.)