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A012253 as a simple table

n a(n)
0 1
1 1
2 1
3 -2
4 -11
5 16
6 301
7 -272
8 -16631
9 7936
10 1620601
11 -353792
12 -250557251
13 22368256
14 56629836901
15 -1903757312
16 -17602836565871
17 209865342976
18 7193368568377201
19 -29088885112832
20 -3735581618747946491

[1,1,1,-2,-11,16,301,-272,-16631,7936,1620601,
 -353792,-250557251,22368256,56629836901,
 -1903757312,-17602836565871,209865342976,
 7193368568377201,-29088885112832,
 -3735581618747946491]

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Last modified September 23 08:47 EDT 2021. Contains 347611 sequences. (Running on oeis4.)