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A061124 as a simple table

na(n)
10
20
30
40
50
60
7504
84032
927216
10514080
114823280
1257081024
13500972472
144412103696
1560619398840
16686638592640
179335025764064
18104304736815552
191180585704051936
2029016515871665280
21478096386437121480

[0,0,0,0,0,0,504,4032,27216,514080,4823280,
 57081024,500972472,4412103696,60619398840,
 686638592640,9335025764064,104304736815552,
 1180585704051936,29016515871665280,
 478096386437121480]