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A024489 as a simple table

na(n)
11
26
370
41050
518018
6336336
76651216
8137181330
92921454250
1063804560820
111422156202740
1232235540595440
13741035948007600
1417240428178136000
15405264998374050240
169612379180184504130
17229799057978874529530
185532199543935868303500
19134014085905039247407500

[1,6,70,1050,18018,336336,6651216,137181330,
 2921454250,63804560820,1422156202740,
 32235540595440,741035948007600,17240428178136000,
 405264998374050240,9612379180184504130,
 229799057978874529530,5532199543935868303500,
 134014085905039247407500]