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A012504 as a simple table

na(n)
01
1-7
2165
3-9931
41037033
5-167246319
638489315917
7-11958291252467
84819985549046353
9-2445005516326951767
101523950240372673482357
11-1144729097700954584840347
121019812687197159075947289145

[1,-7,165,-9931,1037033,-167246319,38489315917,
 -11958291252467,4819985549046353,
 -2445005516326951767,1523950240372673482357,
 -1144729097700954584840347,
 1019812687197159075947289145]