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A211205 as a simple table

na(n)
01
11
22
39
456
5480
65094
760494
8823528
912365424
10206078880
113745686912
1274083090872
131579529362944
1436165466533000
15884104045301640
1622992315801392064
17633547543117707648
1818439576158792912192
19565162707747635408448
2018194047307015185486080

[1,1,2,9,56,480,5094,60494,823528,12365424,
 206078880,3745686912,74083090872,1579529362944,
 36165466533000,884104045301640,22992315801392064,
 633547543117707648,18439576158792912192,
 565162707747635408448,18194047307015185486080]