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A374859 as a simple table

na(n)
01
14
236
3640
421600
51370880
6163924992
737150064640
816065713664000
913343315521536000
1021404225432753602560
1166631099907380661452800
12404128087449517604339712000
134791300434691082493755392000000
14111343541043408070030243833839616000

[1,4,36,640,21600,1370880,163924992,37150064640,
 16065713664000,13343315521536000,
 21404225432753602560,66631099907380661452800,
 404128087449517604339712000,
 4791300434691082493755392000000,
 111343541043408070030243833839616000]