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A268829 as a triangular array

1
13
153
11501
19713
1277151
12901003
123315913
117313151553
151013001501
153711331119113
163710217279053
15701130529013103
1433135315239251711

A268829 as a square array

11111111111111
35159272923175153635743
307703307703
11111111111
350533130133
1091503121053
31150117515
35159272923
301909
1101325
3511
307
31
1
11111111111111
35159272923175153635743
307703307703
11111111111
350533130133
1091503121053
31150117515
35159272923
301909
1101325
3511
307
31
1