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A323722 as a simple table

na(n)
00
11
21
31
4-2
5-7
66
7119
8120
9-2911
10-12518
1190055
12977164
13-2167375
14-83354634
15-168068473
167777602768
1758283146817
18-727882529102
19-12779261480825
2046543629605236
212663317412960849
227760606919565134
23-548896641490323385
24-5830401238269419400
25104847450848773542497

[0,1,1,1,-2,-7,6,119,120,-2911,-12518,90055,
 977164,-2167375,-83354634,-168068473,7777602768,
 58283146817,-727882529102,-12779261480825,
 46543629605236,2663317412960849,7760606919565134,
 -548896641490323385,-5830401238269419400,
 104847450848773542497]