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A115597 as a triangular array

1
12
136
141612
15318434
165231857987
178186753665721302
18118202828722155291873811118
1916542511153911919895785562821043495478

A115597 as a square array

111111111
23456789
616315281118165
128431886720284251
34579536628722115391
8757211552911919895
302873817855628
11182104349
5478
111111111
23456789
616315281118165
128431886720284251
34579536628722115391
8757211552911919895
302873817855628
11182104349
5478