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A089205 as a simple table

na(n)
10
24
354
4768
512500
6233280
74941258
8117440512
93099363912
1090000000000
112853116706110
1298077104930816
133634501279107036
14144456088732254208
156130514465332031250
16276701161105643274240
1713235844190181388226832

[0,4,54,768,12500,233280,4941258,117440512,
 3099363912,90000000000,2853116706110,
 98077104930816,3634501279107036,
 144456088732254208,6130514465332031250,
 276701161105643274240,13235844190181388226832]