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A262899 as a triangular array

7
58
3413
111119
0091720
006151424
00211101625
00096112228
000629182233
00020612182936
000002612272737
0000002623233540
000000022121313243
00000000171729264149
0000000015152722394650

A262899 as a square array

753100000000000
84100000000000
131196200000000
1917151196200000
20141062000000
2416119620000
2522181262000
282218126200
33292723211715
362723211715
3735312927
40322622
434139
4946
50
753100000000000
84100000000000
131196200000000
1917151196200000
20141062000000
2416119620000
2522181262000
282218126200
33292723211715
362723211715
3735312927
40322622
434139
4946
50