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A009179 as a simple table

na(n)
01
1-1
23
3-9
437
5-185
61111
7-7777
862217
9-559953
105599531
11-61594841
12739138093
13-9608795209
14134523132927
15-2017846993905
1632285551902481
17-548854382342177
189879378882159187
19-187708198761024553
203754163975220491061

[1,-1,3,-9,37,-185,1111,-7777,62217,-559953,
 5599531,-61594841,739138093,-9608795209,
 134523132927,-2017846993905,32285551902481,
 -548854382342177,9879378882159187,
 -187708198761024553,3754163975220491061]