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A210530 as a triangular array

1
23
123
4567
12345
67891011
1234567
89101112131415
123456789
10111213141516171819
1234567891011
1213141516171819202122

A210530 as a square array

12141618110112
3252729211213
3638310312314
749411413415
510512514516
11613615617
714716718
15817819
918920
191021
1122

A210530 as an upper right triangle

12141618110112
3252729211213
3638310312314
749411413415
510512514516
11613615617
714716718
15817819
918920
191021
1122

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Last modified March 28 11:46 EDT 2024. Contains 371241 sequences. (Running on oeis4.)