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A012309 as a simple table

n a(n)
0 0
1 0
2 2
3 -3
4 12
5 -40
6 358
7 -2499
8 25032
9 -229104
10 2623482
11 -29520315
12 390572820
13 -5214039480
14 78852514830
15 -1216517478435
16 20752786409040
17 -362913160817760
18 6901242069396210
19 -134803613131143795

[0,0,2,-3,12,-40,358,-2499,25032,-229104,2623482,
 -29520315,390572820,-5214039480,78852514830,
 -1216517478435,20752786409040,-362913160817760,
 6901242069396210,-134803613131143795]

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Last modified April 19 19:02 EDT 2024. Contains 371798 sequences. (Running on oeis4.)