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A220828 as a simple table

na(n)
14
210
320
455
5220
61040
75480
831420
9190360
101202930
117848720
1252543935
13359182620
142498614620
1517640615900
16126142316865
17912047139460
186658803466730
1949035674140240
20363881247076930
212718918248334300
2220442286928323170
23154564065790535680
241174669811887063830

[4,10,20,55,220,1040,5480,31420,190360,1202930,
 7848720,52543935,359182620,2498614620,17640615900,
 126142316865,912047139460,6658803466730,
 49035674140240,363881247076930,2718918248334300,
 20442286928323170,154564065790535680,
 1174669811887063830]