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A242160 as a simple table

na(n)
81
98
1072
11600
125280
1348312
14465036
154708704
1650160825
17561623920
186600378928
1981297463104
201047817553016
2114109488456400
22198192170408400
232899804394683680
2444131025207930595
25697636040687261280
2611441167306954104500
27194421818718469399200

[1,8,72,600,5280,48312,465036,4708704,50160825,
 561623920,6600378928,81297463104,1047817553016,
 14109488456400,198192170408400,2899804394683680,
 44131025207930595,697636040687261280,
 11441167306954104500,194421818718469399200]