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A206278 as a simple table

na(n)
30
40
5128
61024
76656
853248
9387072
103096576
1124092672
12192741376
131530822656
1412246581248
1597793998848
16782351990784
176255953838080
1850047630704640
19400335237545984
203202681900367872
2125620722214764544
22204965777718116352
231639714493699194880
2413117715949593559040
25104941539947077173248
26839532319576617385984

[0,0,128,1024,6656,53248,387072,3096576,24092672,
 192741376,1530822656,12246581248,97793998848,
 782351990784,6255953838080,50047630704640,
 400335237545984,3202681900367872,
 25620722214764544,204965777718116352,
 1639714493699194880,13117715949593559040,
 104941539947077173248,839532319576617385984]