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A134840 as a triangular array

1
12
133
1234
13465
123456
1337597
12445878
1336697129
12345678910
1347512714121511

A134840 as a square array

11111111111
2323232323
334334334
46474647
5555655
6989612
77777
812814
9912
1015
11
11111111111
2323232323
334334334
46474647
5555655
6989612
77777
812814
9912
1015
11