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A273497 as a simple table

na(n)
18
249
3347
42539
520499
6172053
71477193
812994813
9116094359
101049467021
119579839305
1288147018203

[8,49,347,2539,20499,172053,1477193,12994813,
 116094359,1049467021,9579839305,88147018203]