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A186531 as a simple table

na(n)
128522
22004390
3150041994
411180777496
5819481009820
660763226187367
74470558553054728
8330651060182605074
924366494030348841656
101800209299030291069455
11132764213014156819442034

[28522,2004390,150041994,11180777496,819481009820,
 60763226187367,4470558553054728,
 330651060182605074,24366494030348841656,
 1800209299030291069455,132764213014156819442034]