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A210536 as a triangular array

1
24
357
16810
2491113
357121416
16810151719
2491113182022
357121416212325
16810151719242628
249111318202227292
931357121416

A210536 as a square array

123123123129
456456456431
7897897893
10111210111210115
131415131415137
16171816171812
192021192014
2223242216
252627
2829
2
123123123129
456456456431
7897897893
10111210111210115
131415131415137
16171816171812
192021192014
2223242216
252627
2829
2