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A123229 as a triangular array

1
22
323
4434
54345
666456
7664567
88685678
989856789
10109810678910
1110981067891011
121212121012789101112
13121212101278910111213

A123229 as a square array

12345678910111213
2244668810101212
3336669991212
444488881212
5555510101010
6666661212
7777777
888888
99999
10101010
111111
1212
13
12345678910111213
2244668810101212
3336669991212
444488881212
5555510101010
6666661212
7777777
888888
99999
10101010
111111
1212
13