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A261987 as a triangular array

4
89
252627
91929395
115116117119121
527529531532533535
527529531533535536539
13311333133413371339134113431345
133113331334133713391341134313451349

A261987 as a square array

48259111552752713311331
9269211652952913331333
279311753153113341334
9511953253313371337
12153353513391339
53553613411341
53913431343
13451345
1349

A261987 as an upper right triangle

48259111552752713311331
9269211652952913331333
279311753153113341334
9511953253313371337
12153353513391339
53553613411341
53913431343
13451345
1349

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)