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A356667 as a simple table

na(n)
01
11
24
312
472
5240
62520
710080
8127680
9816480
1011037600
1179833600
121514177280
1312454041600
14261655954560
152699348652000
1662869385779200
17711374856192000
1819407798693803520
19243290200817664000
207300765959334848000
21102980278869910041600

[1,1,4,12,72,240,2520,10080,127680,816480,
 11037600,79833600,1514177280,12454041600,
 261655954560,2699348652000,62869385779200,
 711374856192000,19407798693803520,
 243290200817664000,7300765959334848000,
 102980278869910041600]