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A276620 as a triangular array

4
48
41010
481220
410122016
4812221224
4101024162638
48102414304020
41014221420381834
481016123234142240
410102220263822346836
4812281418401426463622
410122083048123074281434

A276620 as a square array

4444444444444
810810810810810810
1012121210101410101212
20202224242216222820
16121614141220148
2426302032261830
38403834384048
201814221412
3422342630
40684674
363628
2214
34
4444444444444
810810810810810810
1012121210101410101212
20202224242216222820
16121614141220148
2426302032261830
38403834384048
201814221412
3422342630
40684674
363628
2214
34