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A268715 as a triangular array

0
11
232
3663
42524
51277125
641561546
771313131377
85412912458
9241251111512249
108274141014427810
111125251015151025251111
1298242914121429248912
13132493131131331319241313

A268715 as a square array

012345678910111213
13621247524811913
265715134122725824
327613125425249
412151391114102931
5413121110151431
674514151213
75124101413
82427252931
98252431
101189
11924
1213
13
012345678910111213
13621247524811913
265715134122725824
327613125425249
412151391114102931
5413121110151431
674514151213
75124101413
82427252931
98252431
101189
11924
1213
13