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A171118 as a simple table

na(n)
01
1-1
245
3-14589
417756793
5-58445425017
6426876362998821
7-6061743911446054965
8152244625648721441783409

[1,-1,45,-14589,17756793,-58445425017,
 426876362998821,-6061743911446054965,
 152244625648721441783409]