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A177596 as a simple table

na(n)
01
11
220
31109
4149777
540505320
619324787629
714885613436177
817346023517866756
929095672934852234945
1067554301929824585326841
11210353969049597164741983000
12855886755812900060235077981449
134452236180954942685194928540509281

[1,1,20,1109,149777,40505320,19324787629,
 14885613436177,17346023517866756,
 29095672934852234945,67554301929824585326841,
 210353969049597164741983000,
 855886755812900060235077981449,
 4452236180954942685194928540509281]