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A363819 as a simple table

na(n)
01
14
21
338
4-193
51697
6-14298
7127836
8-1175835
911078851
10-106354266
111036575329
12-10230191020
13102031153812
14-1026763493315
1510412602349343
16-106308046392516
171091783632303656
18-11271378486953873
19116907289944782853
20-1217649336037820058

[1,4,1,38,-193,1697,-14298,127836,-1175835,
 11078851,-106354266,1036575329,-10230191020,
 102031153812,-1026763493315,10412602349343,
 -106308046392516,1091783632303656,
 -11271378486953873,116907289944782853,
 -1217649336037820058]