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A179074 as a simple table

na(n)
1-2
2-32
3256
4-8192
5-262144
65242880
7-33554432
8-2684354560
98589934592000
10932385860354048
11160159261748363264
12-1125899906842624
13-225179981368524800
145260204364768739328
1543977037871723571052544

[-2,-32,256,-8192,-262144,5242880,-33554432,
 -2684354560,8589934592000,932385860354048,
 160159261748363264,-1125899906842624,
 -225179981368524800,5260204364768739328,
 43977037871723571052544]