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A022685 as a simple table

n a(n)
0 1
1 -25
2 250
3 -1125
4 625
5 15495
6 -54375
7 -20625
8 413325
9 -246425
10 -1719150
11 -854425
12 11885650
13 13624250
14 -73600100
15 -65950175
16 191784500
17 512802500
18 23353075
19 -2854336325
20 -2372290275
21 4919896900
22 19737007600

[1,-25,250,-1125,625,15495,-54375,-20625,413325,
 -246425,-1719150,-854425,11885650,13624250,
 -73600100,-65950175,191784500,512802500,23353075,
 -2854336325,-2372290275,4919896900,19737007600]

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Last modified August 13 11:30 EDT 2022. Contains 356091 sequences. (Running on oeis4.)