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A247403 as a simple table

na(n)
112120
249032
3201172
4826488
53385192
613824356
756865236
8234794368
9969917240
104001182804
1116485572528
1267985714396
13280631148932
141158709193724
154782845970920
1619735114869944
1781437829945420
18336129412428444

[12120,49032,201172,826488,3385192,13824356,
 56865236,234794368,969917240,4001182804,
 16485572528,67985714396,280631148932,
 1158709193724,4782845970920,19735114869944,
 81437829945420,336129412428444]