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A155940 as a triangular array

1
22
234
3445
34566
455677
4567789
566788910
567889101011
67789910111112
67899101111121313
78891010111212131414
7

A155940 as a square array

1223344556677
23445566778
4455667788
566778899
677889910
788991010
9910101111
1010111112
11111212
121313
1314
14
1223344556677
23445566778
4455667788
566778899
677889910
788991010
9910101111
1010111112
11111212
121313
1314
14