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A146198 as a simple table

na(n)
30
440
55606
641698
7158360
8453388
91097036
102364072
114672136
128626500
1315071228
1425146736
1540353752
1662623676
1794395340
18138698168
19199241736
20280511732
21387872316
22527674880
23707373208

[0,40,5606,41698,158360,453388,1097036,2364072,
 4672136,8626500,15071228,25146736,40353752,
 62623676,94395340,138698168,199241736,280511732,
 387872316,527674880,707373208]