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A072782 as a triangular array

0
01
021
1232
02432
134543
0246543
13567654
024687654
1357898765
024681098765
135791011109876
02468101211109876
13579111213

A072782 as a square array

00010101010101
1222323232323
134445454545
23566676767
2457888989
3467910101011
35689111212
4578101113
467910
5689
578
67
6
00010101010101
1222323232323
134445454545
23566676767
2457888989
3467910101011
35689111212
4578101113
467910
5689
578
67
6