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A083301 as a simple table

na(n)
01
16
252
3408
43280
526208
6209728
71677696
813421824
9107374080
10858993664
116871947264
1254975582208
13439804649472
143518437212160
1528147497664512
16225179981381632
171801439850921984
1814411518807638016
19115292150460579840

[1,6,52,408,3280,26208,209728,1677696,13421824,
 107374080,858993664,6871947264,54975582208,
 439804649472,3518437212160,28147497664512,
 225179981381632,1801439850921984,
 14411518807638016,115292150460579840]