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A013230 as a simple table

n a(n)
0 0
1 0
2 -1
3 1
4 -6
5 15
6 -150
7 705
8 -8120
9 56315
10 -750960
11 7042275
12 -106939800
13 1270108125
14 -21672530880
15 312137314125
16 -5928695604000
17 100366159008375
18 -2104970646729600
19 40921600563449775

[0,0,-1,1,-6,15,-150,705,-8120,56315,-750960,
 7042275,-106939800,1270108125,-21672530880,
 312137314125,-5928695604000,100366159008375,
 -2104970646729600,40921600563449775]

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Last modified December 9 03:04 EST 2023. Contains 367681 sequences. (Running on oeis4.)