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A013225 as a simple table

n a(n)
0 0
1 0
2 -1
3 1
4 -6
5 15
6 -90
7 285
8 -1960
9 2275
10 -20160
11 -739125
12 5484600
13 -142631775
14 978257280
15 -20452770975
16 62899668000
17 -1760322929625
18 -37787340240000
19 438469128896175
20 -27777038217435000
21 392637961158139125

[0,0,-1,1,-6,15,-90,285,-1960,2275,-20160,-739125,
 5484600,-142631775,978257280,-20452770975,
 62899668000,-1760322929625,-37787340240000,
 438469128896175,-27777038217435000,
 392637961158139125]

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Last modified May 20 08:57 EDT 2024. Contains 372710 sequences. (Running on oeis4.)