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A321298 as a triangular array

1
21
213
2431
24153
246315
2461537
24683751
246815973
24681037195
2468101593117
246810123711519
24681012159137311
2468101214

A321298 as a square array

12222222222222
1144444444444
331666666666
15318888888
315311010101010
537531121212
759753114
171975
393119
511513
717
93
11
12222222222222
1144444444444
331666666666
15318888888
315311010101010
537531121212
759753114
171975
393119
511513
717
93
11