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A005402 as a simple table

n a(n)
1 0
2 6
3 -12
4 -84
5 1200
6 3120
7 -249312
8 920928
9 86274816
10 -1232035584
11 -40970012160
12 1391730516480
13 20983074318336
14 -1798371774277632

[0,6,-12,-84,1200,3120,-249312,920928,86274816,
 -1232035584,-40970012160,1391730516480,
 20983074318336,-1798371774277632]

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Last modified April 16 14:51 EDT 2024. Contains 371749 sequences. (Running on oeis4.)