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A153168 as a simple table

na(n)
137
25387
3537037
437220537
538870537
63703870537
75555555387
855538720387
9370553872037
10370555370387
11372203887037
12387037038887
13387203705387
14388887053887
15537203703887
16538705553887
17538722205537
18538870538887
19553703722037
20553720538887

[37,5387,537037,37220537,38870537,3703870537,
 5555555387,55538720387,370553872037,370555370387,
 372203887037,387037038887,387203705387,
 388887053887,537203703887,538705553887,
 538722205537,538870538887,553703722037,
 553720538887]