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A051782 as a simple table

na(n)
01
10
22
3-12
4122
5-1620
626882
7-536172
812506762
9-334261380
1010075002962
11-338180323932
1212512502202202
13-505992958647540
1422204726014875042
15-1050993549782729292
1653373431773793542442
17-2894886293042487680100
18167021024758368026331122

[1,0,2,-12,122,-1620,26882,-536172,12506762,
 -334261380,10075002962,-338180323932,
 12512502202202,-505992958647540,22204726014875042,
 -1050993549782729292,53373431773793542442,
 -2894886293042487680100,167021024758368026331122]