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A343089 as a simple table

na(n)
21
38
459
5420
62940
720384
8140479
9964184
106598481
1145059872
12307197620
132091615760
1414226362200
1596680047568
16656559634503
174456100344560
1830228597199443
19204971912361512
201389342336011059
219414200925647540
2263772600432265968
23431892497914345472

[1,8,59,420,2940,20384,140479,964184,6598481,
 45059872,307197620,2091615760,14226362200,
 96680047568,656559634503,4456100344560,
 30228597199443,204971912361512,1389342336011059,
 9414200925647540,63772600432265968,
 431892497914345472]