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A199906 as a simple table

na(n)
11
28
360
4256
51836
612872
777874
8547604
93784512
1025525476
11179010266
121249682864
138709865930
1461360521500
15432263649142
163049721406636
1721595190691722
18153069769124720
191086568858888600
207726348605601340

[1,8,60,256,1836,12872,77874,547604,3784512,
 25525476,179010266,1249682864,8709865930,
 61360521500,432263649142,3049721406636,
 21595190691722,153069769124720,1086568858888600,
 7726348605601340]