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A288530 as a triangular array

0
12
203
3145
45021
531467
6420389
789145106
8653027911
9710112681234
10116870121314515
119710516815161213
1210869301157131416

A288530 as a square array

0123456789101112
20153486711910
340129510678
524013118106
163402759
78526013
910781260
691213811
11314155
45167
151213
1314
16
0123456789101112
20153486711910
340129510678
524013118106
163402759
78526013
910781260
691213811
11314155
45167
151213
1314
16