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A087905 as a simple table

na(n)
11
23
38
436
5144
61010
75760
850400
9416640
104250232
1143545600
12553106400
136706022400
1495865541200
151410695430144
1622720842144000
17376610217984000
186888030445296000
19128047474114560000
202587520533615041024

[1,3,8,36,144,1010,5760,50400,416640,4250232,
 43545600,553106400,6706022400,95865541200,
 1410695430144,22720842144000,376610217984000,
 6888030445296000,128047474114560000,
 2587520533615041024]