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A232995 as a simple table

na(n)
30
40
5128
66912
7301056
813107200
9604661760
1030105600000
111625414303744
1295105071448064
136014219459788800
14409597814515957760
1529930757120000000000
162338124811342685667328
17194579196865600687702016
1817194638200501483392204800
191608612930338829120118456320
20158879430213632000000000000000

[0,0,128,6912,301056,13107200,604661760,
 30105600000,1625414303744,95105071448064,
 6014219459788800,409597814515957760,
 29930757120000000000,2338124811342685667328,
 194579196865600687702016,
 17194638200501483392204800,
 1608612930338829120118456320,
 158879430213632000000000000000]