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A234294 as a simple table

na(n)
01
11
24
340
4664
515424
6460576
716808320
8724904896
936072438016
102034328297984
11128223244372480
128932539799788544
13681536817951791104
1456521548341146402816
155062454448656689500160
16487013865350356256137216
1750082306316236214342844416
185482502331779770770018893824

[1,1,4,40,664,15424,460576,16808320,724904896,
 36072438016,2034328297984,128223244372480,
 8932539799788544,681536817951791104,
 56521548341146402816,5062454448656689500160,
 487013865350356256137216,
 50082306316236214342844416,
 5482502331779770770018893824]