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A009842 as a simple table

n a(n)
0 0
1 1
2 0
3 -5
4 12
5 6
6 -120
7 442
8 -2352
9 13192
10 53280
11 -1665432
12 12223200
13 -6629648
14 -706340544
15 9387463888
16 -95898673920
17 563447710848
18 8308014488064
19 -283290718941056
20 3505513923832320
21 -9173243369732864
22 -499029405102412800

[0,1,0,-5,12,6,-120,442,-2352,13192,53280,
 -1665432,12223200,-6629648,-706340544,9387463888,
 -95898673920,563447710848,8308014488064,
 -283290718941056,3505513923832320,
 -9173243369732864,-499029405102412800]

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Last modified April 25 11:34 EDT 2024. Contains 371967 sequences. (Running on oeis4.)