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A131507 as a triangular array

1
33
555
7777
99999
111111111111
13131313131313
1515151515151515
171717171717171717
19191919191919191919
2121212121212121212121
232323232323232323232323

A131507 as a square array

1357911131517192123
357911131517192123
57911131517192123
7911131517192123
911131517192123
11131517192123
131517192123
1517192123
17192123
192123
2123
23

A131507 as an upper right triangle

1357911131517192123
357911131517192123
57911131517192123
7911131517192123
911131517192123
11131517192123
131517192123
1517192123
17192123
192123
2123
23

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Last modified August 22 16:13 EDT 2024. Contains 375369 sequences. (Running on oeis4.)