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A303696 as a triangular array

1
12
124
1247
124612
12461221
1246102037
124610173865
124610162866114
124610162649124200
12461016264284224351
12461016264270148424616

A303696 as a square array

111111111111
22222222222
4444444444
766666666
1212101010101010
21201716161616
373828262626
6566494242
1141248470
200224148
351424
616
111111111111
22222222222
4444444444
766666666
1212101010101010
21201716161616
373828262626
6566494242
1141248470
200224148
351424
616