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A113126 as a triangular array

1
12
123
1234
02345
003456
0004567
00005678
000006789
00000078910
0000000891011
000000009101112
00000000010111213
0000000000

A113126 as a square array

11110000000000
2222000000000
333300000000
44440000000
5555000000
666600000
77770000
8888000
999900
101010100
111111
1212
13
11110000000000
2222000000000
333300000000
44440000000
5555000000
666600000
77770000
8888000
999900
101010100
111111
1212
13