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A203715 as a simple table

na(n)
11
23
36
434
5120
61096
75040
856848
9362880
105451136
1139916800
12688876288
136227020800
14130789805056
151307674368000
1629497569445888
17355687428096000
189746045395173376
19121645100408832000
203451902721622867968
2151090942171709440000
221686006043164464644096

[1,3,6,34,120,1096,5040,56848,362880,5451136,
 39916800,688876288,6227020800,130789805056,
 1307674368000,29497569445888,355687428096000,
 9746045395173376,121645100408832000,
 3451902721622867968,51090942171709440000,
 1686006043164464644096]