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A259578 as a triangular array

2
22
232
2332
24342
245542
2566652
25688652
268101010862
26911121211962
2791214151412972
27111416171716141172
28

A259578 as a square array

2222222222222
233445566778
23356689911
2456810111214
246810121416
25610121517
258111417
2691216
26914
2711
27
2
2222222222222
233445566778
23356689911
2456810111214
246810121416
25610121517
258111417
2691216
26914
2711
27
2