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A250542 as a simple table

na(n)
1905440
213657024
3117777788
4752602024
54013192386
619031828420
783356429646
8345394150196
91375930596944
105328628464360
1120220736129384
1275618410690640
13279874213617366
141028575074942300
153763545764867642
1613740591719926652

[905440,13657024,117777788,752602024,4013192386,
 19031828420,83356429646,345394150196,
 1375930596944,5328628464360,20220736129384,
 75618410690640,279874213617366,1028575074942300,
 3763545764867642,13740591719926652]