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A280869 as a simple table

na(n)
01
1-1008
2220752
316519104
4399517776
54624512480
634423752384
7187506813312
8814794618960
92975666040144
109486668147040
1127052407031104
1270486610910912
13169931677686624
14384163181281152
15820165393918080
161668889095288912
173249638073414432

[1,-1008,220752,16519104,399517776,4624512480,
 34423752384,187506813312,814794618960,
 2975666040144,9486668147040,27052407031104,
 70486610910912,169931677686624,384163181281152,
 820165393918080,1668889095288912,3249638073414432]