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A273639 as a simple table

na(n)
01
18
244
3205
4901
53633
614677
759125
8237109
9951249
103804061
1115204521
1260841793
13243398773
14973620069
153894638321

[1,8,44,205,901,3633,14677,59125,237109,951249,
 3804061,15204521,60841793,243398773,973620069,
 3894638321]