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A340524 as a triangular array

1
20
201
3021
20222
403242
2023444
40426484
302446887
404284128148
203448812141612
60438416821162414
2024688161424242821

A340524 as a square array

1223242434262
000000000000
12232424342
1223242434
244648486
24464848
488128168
48812816
714142114
8161624
122424
1428
21
1223242434262
000000000000
12232424342
1223242434
244648486
24464848
488128168
48812816
714142114
8161624
122424
1428
21