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A309931 as a triangular array

1
11
121
1131
12341
111651
12341061
1135101571
121410202181
11361121352891
12341024425636101
1115102549788445111

A309931 as a square array

111111111111
12121212121
1331331331
146454645
15101010111010
161520212425
1721354249
18285678
193684
11045
111
1
111111111111
12121212121
1331331331
146454645
15101010111010
161520212425
1721354249
18285678
193684
11045
111
1