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A178272 as a simple table

na(n)
10
20
30
40
50
60
72080
826032
9172872
10813072
113044712
129667152
1327131344
1468725744
15160984560
16351148064
17725480624
181421692128

[0,0,0,0,0,0,2080,26032,172872,813072,3044712,
 9667152,27131344,68725744,160984560,351148064,
 725480624,1421692128]