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A271355 as a triangular array

1
21
321
4321
74321
1174321
181174321
29181174321
4729181174321
764729181174321
123764729181174321
1991237647291811743

A271355 as a square array

123471118294776123199
123471118294776123
123471118294776
1234711182947
12347111829
123471118
1234711
12347
1234
123
1
123471118294776123199
123471118294776123
123471118294776
1234711182947
12347111829
123471118
1234711
12347
1234
123
1