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A014985 as a simple table

na(n)
11
2-3
313
4-51
5205
6-819
73277
8-13107
952429
10-209715
11838861
12-3355443
1313421773
14-53687091
15214748365
16-858993459
173435973837
18-13743895347
1954975581389
20-219902325555
21879609302221
22-3518437208883
2314073748835533

[1,-3,13,-51,205,-819,3277,-13107,52429,-209715,
 838861,-3355443,13421773,-53687091,214748365,
 -858993459,3435973837,-13743895347,54975581389,
 -219902325555,879609302221,-3518437208883,
 14073748835533]