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A008964 as a simple table

na(n)
11
22
36
428
5192
61952
728800
8618496
919132416
10853508096
1154584672256
125007197863936
13656391329021952
14122997864673574912
1532863344789678981120
1612522141669213840867328
176792468641646224590503936
185245768641385222636392415232

[1,2,6,28,192,1952,28800,618496,19132416,
 853508096,54584672256,5007197863936,
 656391329021952,122997864673574912,
 32863344789678981120,12522141669213840867328,
 6792468641646224590503936,
 5245768641385222636392415232]