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A090007 as a simple table

na(n)
1512
29728
3416256
425703936
51957983744
61705359223200
716300354777600
81668063096387072
9179845756064329728
1020206497983891554816

[512,9728,416256,25703936,1957983744,
 1705359223200,16300354777600,1668063096387072,
 179845756064329728,20206497983891554816]