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A357721 as a simple table

n a(n)
0 1
1 0
2 -2
3 9
4 -28
5 0
6 1200
7 -16464
8 167904
9 -1393200
10 7429240
11 43124400
12 -2404571904
13 55590286752
14 -1027511503200
15 16489054310400
16 -222885864448000
17 1994839594780032
18 14489184835474272
19 -1470395490046560000
20 54581408106475622400
21 -1608207353670788640000

[1,0,-2,9,-28,0,1200,-16464,167904,-1393200,
 7429240,43124400,-2404571904,55590286752,
 -1027511503200,16489054310400,-222885864448000,
 1994839594780032,14489184835474272,
 -1470395490046560000,54581408106475622400,
 -1608207353670788640000]

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Last modified May 25 04:52 EDT 2024. Contains 372782 sequences. (Running on oeis4.)