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A200424 as a simple table

na(n)
120
280
3212
4594
51928
66780
723674
880750
9271000
10909282
113082640
1210545846
1336174576
14123964062
15424595930
161456168762
175004245744
1817226485764
1959361633214
20204702938074
21706403203606
222439664629760
238432567247356

[20,80,212,594,1928,6780,23674,80750,271000,
 909282,3082640,10545846,36174576,123964062,
 424595930,1456168762,5004245744,17226485764,
 59361633214,204702938074,706403203606,
 2439664629760,8432567247356]