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A350820 as a triangular array

1
22
161
4334
31210123
12292921
817121178
4225252224
1201192229211201
1324621313246213
524143288341245
1233243443434344324321

A350820 as a square array

1214318411351
263122172202242
13102912114613
412292529224324
3215222133344
1172921328834
82112334
420464344
121324
13243
52
1
1214318411351
263122172202242
13102912114613
412292529224324
3215222133344
1172921328834
82112334
420464344
121324
13243
52
1