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A216250 as a triangular array

1
23
546
781112
109141315
161720212425
19182322272628
2930333437384142
323136354039444345
46475051545558596263
4948535257566160656466
67

A216250 as a square array

12571016192932464967
3489171830314748
61114202333365053
1213212234355152
15242737405457
252638395556
2841445861
42435960
456265
6364
66
12571016192932464967
3489171830314748
61114202333365053
1213212234355152
15242737405457
252638395556
2841445861
42435960
456265
6364
66