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A320972 as a simple table

na(n)
01
1-2
2-8
3-2
430
5110
692
7-182
8-976
9-2064
10-1488
113714
1217618
1335814
1437680
15-25278
16-216910
17-541538
18-819268
19-480334
201441634
215924858
2212518720
2316883366
247972200
25-32275008
26-120780700
27-250726492
28-349220282
29-229745138
30424373412
311958370998
324418456156

[1,-2,-8,-2,30,110,92,-182,-976,-2064,-1488,3714,
 17618,35814,37680,-25278,-216910,-541538,-819268,
 -480334,1441634,5924858,12518720,16883366,7972200,
 -32275008,-120780700,-250726492,-349220282,
 -229745138,424373412,1958370998,4418456156]