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A240684 as a simple table

na(n)
71
828
9630
1014070
11331485
128411634
13231354123
146899167275
15222569372025
167741879425280
17289297137120992
1811570476164077376
19493535471267193810
2022376155441920000000
211074961750207964923710
2254561107576767408522752
232918071167402563863036269

[1,28,630,14070,331485,8411634,231354123,
 6899167275,222569372025,7741879425280,
 289297137120992,11570476164077376,
 493535471267193810,22376155441920000000,
 1074961750207964923710,54561107576767408522752,
 2918071167402563863036269]