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A337420 as a simple table

na(n)
01
11
2-14
3-7
41222
5-14873
626196
73522955
8-110841786
92088947819
10-15869398244
11-823790768205
1255262757020956
13-2199333670723343
1465894251730104552
15-1235877788883794355
16-18904175519674543546
173743957841955101437667
18-268850524243738610546292
1914826380281246309472525851

[1,1,-14,-7,1222,-14873,26196,3522955,-110841786,
 2088947819,-15869398244,-823790768205,
 55262757020956,-2199333670723343,
 65894251730104552,-1235877788883794355,
 -18904175519674543546,3743957841955101437667,
 -268850524243738610546292,
 14826380281246309472525851]