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A327683 as a simple table

na(n)
01
11
20
34
4-5
517
6-40
7144
8-459
91517
10-5111
1117747
12-62074
13219292
14-782602
152816664
16-10205754
1737203230
18-136360106
19502219652
20-1857659296
216897983144
22-25704335380
2396090440940
24-360265425619
251354343161419
26-5103948546609
2719278502980063
28-72972099256954

[1,1,0,4,-5,17,-40,144,-459,1517,-5111,17747,
 -62074,219292,-782602,2816664,-10205754,37203230,
 -136360106,502219652,-1857659296,6897983144,
 -25704335380,96090440940,-360265425619,
 1354343161419,-5103948546609,19278502980063,
 -72972099256954]