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A013469 as a simple table

na(n)
01
1-2
212
3-122
41792
5-35282
6889152
7-27747722
81045556992
9-46640267042
102424156352512
11-144890071612442
129849171061952512
13-754330752297972722
1464566114865428283392

[1,-2,12,-122,1792,-35282,889152,-27747722,
 1045556992,-46640267042,2424156352512,
 -144890071612442,9849171061952512,
 -754330752297972722,64566114865428283392]