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A284568 as a simple table

na(n)
01
11
21
31
41
51
636
736
8576
9576
1057600
1157600
1257600
1357600
142822400
1525401600
1625401600
1725401600
188230118400
198230118400
203292047360000
213292047360000
22398337730560000
23398337730560000
2414340158300160000
2514340158300160000
262423486752727040000
272423486752727040000
281900013614137999360000
291900013614137999360000

[1,1,1,1,1,1,36,36,576,576,57600,57600,57600,
 57600,2822400,25401600,25401600,25401600,
 8230118400,8230118400,3292047360000,3292047360000,
 398337730560000,398337730560000,14340158300160000,
 14340158300160000,2423486752727040000,
 2423486752727040000,1900013614137999360000,
 1900013614137999360000]