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A273630 as a simple table

n a(n)
0 0
1 -1
2 0
3 162
4 0
5 -11250
6 0
7 576240
8 0
9 -25259850
10 0
11 1007242236
12 0
13 -37685439792
14 0
15 1346871240000
16 0
17 -46504059326010
18 0
19 1562983866658500
20 0
21 -51407781284599740
22 0
23 1661123953798807680
24 0
25 -52886433789393750000
26 0
27 1662782404368229351200

[0,-1,0,162,0,-11250,0,576240,0,-25259850,0,
 1007242236,0,-37685439792,0,1346871240000,0,
 -46504059326010,0,1562983866658500,0,
 -51407781284599740,0,1661123953798807680,0,
 -52886433789393750000,0,1662782404368229351200]

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Last modified April 19 07:38 EDT 2024. Contains 371782 sequences. (Running on oeis4.)