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A168305 as a simple table

na(n)
4-15
5-48
62024
731616
8274480
91784320
109645312
1145735936
12196441344
13780595200
142912532480
1510315202560
1634963222528
17114140905472
18360716042240
191108051230720
203319564664832
219726122262528
2227935264735232
2378810426900480
24218761889054720
25598349308755968

[-15,-48,2024,31616,274480,1784320,9645312,
 45735936,196441344,780595200,2912532480,
 10315202560,34963222528,114140905472,360716042240,
 1108051230720,3319564664832,9726122262528,
 27935264735232,78810426900480,218761889054720,
 598349308755968]