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A265419 as a simple table

na(n)
10
20
30
44
548
6584
78096
8127296
92241856
1043770144
11939182976
1221981580224
13557527020544
1415236894019072
15446459870047232
1613964134704426752
17464407462322500608

[0,0,0,4,48,584,8096,127296,2241856,43770144,
 939182976,21981580224,557527020544,15236894019072,
 446459870047232,13964134704426752,
 464407462322500608]