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A027488 as a simple table

na(n)
31
430
51035
645675
72582209
8183962268
916206744140
101734708878100
11222083697846516
1233544055541553128
135906505211210055088
141199823052824417425040
15278598452852079082857744
1673346715446248518553100160
1721736011315987768499695624960

[1,30,1035,45675,2582209,183962268,16206744140,
 1734708878100,222083697846516,33544055541553128,
 5906505211210055088,1199823052824417425040,
 278598452852079082857744,
 73346715446248518553100160,
 21736011315987768499695624960]