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A234951 as a triangular array

1
12
133
1344
14565
146776
1469997
15791111108
15710121413129
15811131415151310
1581113161618171511
15812141718192019

A234951 as a square array

111111111111
23344455555
3456677888
4679910111112
5791112131314
691114141617
71013151618
812151819
9131720
101519
11
111111111111
23344455555
3456677888
4679910111112
5791112131314
691114141617
71013151618
812151819
9131720
101519
11