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A012747 as a simple table

n a(n)
0 1
1 1
2 -3
3 45
4 2457
5 161625
6 20549397
7 3457938757
8 772773915313
9 221864504883633
10 79479234590193325
11 34768359140993612893
12 18241340561609524790601
13 11306811847252896133698825 

[1,1,-3,45,2457,161625,20549397,3457938757,
 772773915313,221864504883633,79479234590193325,
 34768359140993612893,18241340561609524790601,
 11306811847252896133698825]

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Last modified May 17 17:07 EDT 2024. Contains 372603 sequences. (Running on oeis4.)