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A361847 as a simple table

na(n)
01
13
212
327
4-75
5-444
64734
711532
8-466782
91626750
1050347410
11-708889296
12-2196754992
13179878246239
14-1795732735128
15-24691325878980
16953903679982809
17-7684914725016600
18-226465559200630566
197742131606464606525
20-58889021552013912990

[1,3,12,27,-75,-444,4734,11532,-466782,1626750,
 50347410,-708889296,-2196754992,179878246239,
 -1795732735128,-24691325878980,953903679982809,
 -7684914725016600,-226465559200630566,
 7742131606464606525,-58889021552013912990]