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A219121 as a simple table

n a(n)
1 1
2 1
3 -2
4 -19
5 -74
6 -68
7 1856
8 22717
9 182806
10 1095506
11 2706452
12 -62235754
13 -1630900556
14 -28213310474
15 -422792067164
16 -5747245586467
17 -68720160772442
18 -602550199498622
19 1056275553274100
20 251539588303778798
21 9237652624016037908
22 263685036472764512992

[1,1,-2,-19,-74,-68,1856,22717,182806,1095506,
 2706452,-62235754,-1630900556,-28213310474,
 -422792067164,-5747245586467,-68720160772442,
 -602550199498622,1056275553274100,
 251539588303778798,9237652624016037908,
 263685036472764512992]

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Last modified May 7 19:02 EDT 2021. Contains 343652 sequences. (Running on oeis4.)