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A054721 as a simple table

na(n)
01
16
230
3210
41260
57770
646410
7279930
81678320
910077480
1060458370
11362797050
122176734420
1313060694010
1478363884130
15470184976590
162821108227840
1716926659444730
18101559946544280
19609359740010490
203656158379595540
2121936950640097710
22131621703479470050

[1,6,30,210,1260,7770,46410,279930,1678320,
 10077480,60458370,362797050,2176734420,
 13060694010,78363884130,470184976590,
 2821108227840,16926659444730,101559946544280,
 609359740010490,3656158379595540,
 21936950640097710,131621703479470050]