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A259874 as a triangular array

1
11
121
1331
14541
157851
169121061
171117161471
18132222231681
1915272934282091
1101732

A259874 as a square array

11111111111
12345678910
1357911131517
1481217222732
1510162229
16142334
171628
1820
19
1

A259874 as an upper right triangle

11111111111
12345678910
1357911131517
1481217222732
1510162229
16142334
171628
1820
19
1

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Last modified March 28 12:59 EDT 2024. Contains 371254 sequences. (Running on oeis4.)