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A064332 as a simple table

na(n)
01
11
2-9
3181
4-4529
5126861
6-3806649
7119653941
8-3889122369
9129646443421
10-4408213959689
11152290162367301
12-5330337257966609
13188617242067457581
14-6736489341630231129
15242518500968942706261
16-8791448318093732481249

[1,1,-9,181,-4529,126861,-3806649,119653941,
 -3889122369,129646443421,-4408213959689,
 152290162367301,-5330337257966609,
 188617242067457581,-6736489341630231129,
 242518500968942706261,-8791448318093732481249]