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A047819 as a simple table

na(n)
01
120
2175
3980
44116
514112
641580
7108900
8259545
9572572
101184183
112318680
124331600
137768320
1413441968
1522535064
1636729945
1758373700
1890684055
19138003404
20206108980
21302588000
22437287500
23622849500
24875343105
251215006156
261667110095

[1,20,175,980,4116,14112,41580,108900,259545,
 572572,1184183,2318680,4331600,7768320,13441968,
 22535064,36729945,58373700,90684055,138003404,
 206108980,302588000,437287500,622849500,875343105,
 1215006156,1667110095]