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A284860 as a simple table

na(n)
01
1-2
2-5
319
4178
5175
6-7739
7-72056
8-33179
96899311
1087861076
11215532301
12-11151014291
13-222077806202
14-1563185592617
1522953386817343
16878911293113026
1712330887396253691
181416506544326449
19-4284948239134152536

[1,-2,-5,19,178,175,-7739,-72056,-33179,6899311,
 87861076,215532301,-11151014291,-222077806202,
 -1563185592617,22953386817343,878911293113026,
 12330887396253691,1416506544326449,
 -4284948239134152536]