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A264342 as a simple table

na(n)
18
255
3490
43567
528925
6223356
71759250
813750304
9107777857
10843913133
116610346674
1251772001513
13405494413096
143175909815583
1524874462255642
16194822212724279
171525890963999701
1811951115491689468
1993603785927597586

[8,55,490,3567,28925,223356,1759250,13750304,
 107777857,843913133,6610346674,51772001513,
 405494413096,3175909815583,24874462255642,
 194822212724279,1525890963999701,
 11951115491689468,93603785927597586]