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A371551 as a simple table

na(n)
01
1-2
20
310
4-4
5-42
6-258
7306
85980
93142
1061730
11-794334
12-3299074
13-8459830
1440220390
151550926110
161631691740
1743693916390
18-125593997262
19-4079362135854
20-32054212967294
21-33715330874838
22-600410923342450
239383532800084966
24329821022627776798

[1,-2,0,10,-4,-42,-258,306,5980,3142,61730,
 -794334,-3299074,-8459830,40220390,1550926110,
 1631691740,43693916390,-125593997262,
 -4079362135854,-32054212967294,-33715330874838,
 -600410923342450,9383532800084966,
 329821022627776798]