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A013000 as a simple table

na(n)
02
1-16
2808
3-99328
422756480
5-8373489408
64518380796928
7-3361577372366848
83297920024665948160
9-4125214890387616169984
106407889739355365222383616
11-12101572905129973895312965632

[2,-16,808,-99328,22756480,-8373489408,
 4518380796928,-3361577372366848,
 3297920024665948160,-4125214890387616169984,
 6407889739355365222383616,
 -12101572905129973895312965632]