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A098111 as a simple table

n a(n)
0 1
1 0
2 -5
3 -25
4 -100
5 -375
6 -1375
7 -5000
8 -18125
9 -65625
10 -237500
11 -859375
12 -3109375
13 -11250000
14 -40703125
15 -147265625
16 -532812500
17 -1927734375
18 -6974609375
19 -25234375000
20 -91298828125
21 -330322265625
22 -1195117187500
23 -4323974609375
24 -15644287109375
25 -56601562500000

[1,0,-5,-25,-100,-375,-1375,-5000,-18125,-65625,
 -237500,-859375,-3109375,-11250000,-40703125,
 -147265625,-532812500,-1927734375,-6974609375,
 -25234375000,-91298828125,-330322265625,
 -1195117187500,-4323974609375,-15644287109375,
 -56601562500000]

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Last modified March 29 00:26 EDT 2024. Contains 371264 sequences. (Running on oeis4.)