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A321967 as a simple table

na(n)
01
10
21
30
4-4
511
60
715
8-156
9302
100
11-56
121596
13-9528
1415619
150
16210
17-14400
18193185
19-882340
201310354
210
22-792
23122265
24-3213760
2530042672
26-116857368
27162512286
280
293003
30-1005004
3147887840
32-802069632
336034981134
34-21078701112
3527971176092

[1,0,1,0,-4,11,0,15,-156,302,0,-56,1596,-9528,
 15619,0,210,-14400,193185,-882340,1310354,0,-792,
 122265,-3213760,30042672,-116857368,162512286,0,
 3003,-1005004,47887840,-802069632,6034981134,
 -21078701112,27971176092]