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A229280 as a simple table

na(n)
00
16
257
3468
43564
525920
6182736
71259712
88538048
957106944
10377913600
112479113216
1216144468992
13104485552128
14672625741824
154310029025280
1627505821597696
17174908814262272
181108696193630208
197007637010120704
2044178581150760960
21277868041444786176

[0,6,57,468,3564,25920,182736,1259712,8538048,
 57106944,377913600,2479113216,16144468992,
 104485552128,672625741824,4310029025280,
 27505821597696,174908814262272,1108696193630208,
 7007637010120704,44178581150760960,
 277868041444786176]