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A010831 as a simple table

na(n)
01
1-26
2299
3-1950
47475
5-13754
6-12220
7132756
8-276575
90
101010100
11-1486030
12-519961
132486300
14829725
15-2215486
16-11643060
1718523050
1816317925
19-42861650
200
2111010090
2259644221
23-5743400
24-138219900

[1,-26,299,-1950,7475,-13754,-12220,132756,
 -276575,0,1010100,-1486030,-519961,2486300,829725,
 -2215486,-11643060,18523050,16317925,-42861650,0,
 11010090,59644221,-5743400,-138219900]