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A236789 as a triangular array

81
255255
7701097770
2475445244522475
79671985123675198517967
26320878891451241451248788926320
87685405350867928128791986792840535087685
2963411877803554756510951425109514255547565

A236789 as a square array

81255770247579672632087685296341
2551097445219851878894053501877803
7704452236751451248679285547565
247519851145124128791910951425
79678788986792810951425
263204053505547565
87685
81255770247579672632087685296341
2551097445219851878894053501877803
7704452236751451248679285547565
247519851145124128791910951425
79678788986792810951425
263204053505547565
87685