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A054766 as a simple table

na(n)
01
10
21
35
444
5476
66336
799504
81803024
937019664
10849418560
1121539756160
12598194037440
1318056575823040
14588622339549440
1520609136708249600
16771323264354361600
1730729606721005830400
181298448658633614566400

[1,0,1,5,44,476,6336,99504,1803024,37019664,
 849418560,21539756160,598194037440,18056575823040,
 588622339549440,20609136708249600,
 771323264354361600,30729606721005830400,
 1298448658633614566400]