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A200904 as a simple table

n a(n)
1 1
2 0
3 -6
4 -24
5 170
6 3420
7 7126
8 -612528
9 -9539982
10 84591300
11 5635854158
12 50835366648
13 -2827700267990
14 -99260514667860
15 438301096424070
16 118700423262570144
17 2500018105640527586
18 -100537942668123244140
19 -6930391127610546125378
20 -31482610140761483476920

[1,0,-6,-24,170,3420,7126,-612528,-9539982,
 84591300,5635854158,50835366648,-2827700267990,
 -99260514667860,438301096424070,
 118700423262570144,2500018105640527586,
 -100537942668123244140,-6930391127610546125378,
 -31482610140761483476920]

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Last modified October 19 11:26 EDT 2019. Contains 328216 sequences. (Running on oeis4.)