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A048151 as a triangular array

0
10
120
1230
12340
123450
1234560
12345670
123456780
1234567890
123456789100
12345678910110
1234567891011120

A048151 as a square array

0111111111111
022222222222
03333333333
0444444444
055555555
06666666
0777777
088888
09999
0101010
01111
012
0
0111111111111
022222222222
03333333333
0444444444
055555555
06666666
0777777
088888
09999
0101010
01111
012
0