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A284016 as a simple table

na(n)
-1-1
02
12
24
310
428
584
6264
7858
82860
99724
1033592
11117572
12416024
131485800
145348880
1519389690
1670715340
17259289580
18955277400
193534526380
2013128240840
2148932534040
22182965127280
23686119227300
242579808294648
259723892802904
2636734706144304
27139067101832008
28527495903500720
292004484433302736

[-1,2,2,4,10,28,84,264,858,2860,9724,33592,117572,
 416024,1485800,5348880,19389690,70715340,
 259289580,955277400,3534526380,13128240840,
 48932534040,182965127280,686119227300,
 2579808294648,9723892802904,36734706144304,
 139067101832008,527495903500720,2004484433302736]