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A080498 as a simple table

na(n)
11
21
31
41
51
62
73
88
915
1048
11210
121152
133780
1419200
1562370
16322560
172162160
1817418240
1981081000
20567705600
212481078600
2216907304960
23146659312800
241504935936000
258799558768000
2676435881984000
27819678899239200

[1,1,1,1,1,2,3,8,15,48,210,1152,3780,19200,62370,
 322560,2162160,17418240,81081000,567705600,
 2481078600,16907304960,146659312800,1504935936000,
 8799558768000,76435881984000,819678899239200]