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A196588 as a simple table

na(n)
18
2648
324032
4839370
529573040
61051645368
737529013812
81334022464052
947492318713306
101690727011393186
1160171492901857682
122141772804448431736
1376233239090665487626
142713397484827660769804
1596579722219372717289244

[8,648,24032,839370,29573040,1051645368,
 37529013812,1334022464052,47492318713306,
 1690727011393186,60171492901857682,
 2141772804448431736,76233239090665487626,
 2713397484827660769804,96579722219372717289244]