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A007744 as a simple table

na(n)
01
120
2210
31680
411550
572072
6420420
72333760
812471030
964664600
10327202876
111622493600
127909656300
1338003792400
14180324117000
15846321189120
163934071152550
1718132120329400
1882937661506700

[1,20,210,1680,11550,72072,420420,2333760,
 12471030,64664600,327202876,1622493600,7909656300,
 38003792400,180324117000,846321189120,
 3934071152550,18132120329400,82937661506700]