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A297089 as a simple table

na(n)
18
245
3228
41256
56859
637423
7204625
81118722
96116809
1033447020
11182892241
121000087412
135468684870
1429903969555
15163521690265
16894174288809
174889552732983
1826737214978212
19146205342087568
20799485028137183

[8,45,228,1256,6859,37423,204625,1118722,6116809,
 33447020,182892241,1000087412,5468684870,
 29903969555,163521690265,894174288809,
 4889552732983,26737214978212,146205342087568,
 799485028137183]