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A026005 as a simple table

na(n)
01
14
227
3208
41700
514364
6123970
71085760
89612108
985795600
10770755843
116960408624
1263127818572
13574609830760
145246348656500
1548027225765120
16440671237120764
174051508174260272
1837315784743418332

[1,4,27,208,1700,14364,123970,1085760,9612108,
 85795600,770755843,6960408624,63127818572,
 574609830760,5246348656500,48027225765120,
 440671237120764,4051508174260272,
 37315784743418332]