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A300593 as a simple table

na(n)
11
26
3216
418016
52718575
6667151244
7249904389518
8136335045655680
9104258627494173747
10108236370325030253850
11148475074256982964816314
12263023328027145941803648512
13590040725672004981627313856146
141648073412972421008768279297745708
155648002661974709728272920853918580200
1623444503972399728196572891896057248430080

[1,6,216,18016,2718575,667151244,249904389518,
 136335045655680,104258627494173747,
 108236370325030253850,148475074256982964816314,
 263023328027145941803648512,
 590040725672004981627313856146,
 1648073412972421008768279297745708,
 5648002661974709728272920853918580200,
 23444503972399728196572891896057248430080]