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A012964 as a simple table

n a(n)
0 1
1 0
2 -4
3 6
4 13
5 -20
6 -550
7 1470
8 23965
9 -91800
10 -1736800
11 5533550
12 261341425
13 -1560159900
14 -32046389050
15 113528073750
16 10312454985625
17 -82637650862000
18 -1992440583581500
19 7977656452281750

[1,0,-4,6,13,-20,-550,1470,23965,-91800,-1736800,
 5533550,261341425,-1560159900,-32046389050,
 113528073750,10312454985625,-82637650862000,
 -1992440583581500,7977656452281750]

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Last modified March 28 10:31 EDT 2024. Contains 371240 sequences. (Running on oeis4.)