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A163145 as a simple table

na(n)
01
121
2420
38400
4167790
53351600
666948210
71337288400
826712295890
9533577313500
1010658190898110
11212897044846500
124252612111884990
1384945799915397400
141696789816099808010
1533893325895893882600
16677018172425014524090
1713523417772619230573300

[1,21,420,8400,167790,3351600,66948210,1337288400,
 26712295890,533577313500,10658190898110,
 212897044846500,4252612111884990,
 84945799915397400,1696789816099808010,
 33893325895893882600,677018172425014524090,
 13523417772619230573300]