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A080073 as a simple table

n a(n)
0 1
1 1
2 0
3 -3
4 4
5 50
6 -264
7 -1638
8 25264
9 40896
10 -3357360
11 13380840
12 559239264
13 -7126367664
14 -98536058880
15 3137828374800
16 8293939695360
17 -1427422903584000
18 10789876955529216
19 666226173751955712
20 -14427332604300810240
21 -279534553922071445760

[1,1,0,-3,4,50,-264,-1638,25264,40896,-3357360,
 13380840,559239264,-7126367664,-98536058880,
 3137828374800,8293939695360,-1427422903584000,
 10789876955529216,666226173751955712,
 -14427332604300810240,-279534553922071445760]

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Last modified February 27 18:40 EST 2024. Contains 370378 sequences. (Running on oeis4.)