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A347499 as a triangular array

1
12
123
1235
13456
134567
1256789
125678911
12567891113
12578911121315
1257891112131517
125789111213151719

A347499 as a square array

111111111111
22233222222
3344555555
555666777
66777888
7888999
999111111
1111121212
13131313
151515
1717
19

A347499 as an upper right triangle

111111111111
22233222222
3344555555
555666777
66777888
7888999
999111111
1111121212
13131313
151515
1717
19

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Last modified January 28 12:11 EST 2023. Contains 359867 sequences. (Running on oeis4.)