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A026747 as a triangular array

1
11
131
1441
161151
17171661
1930442271
1103974662981
11258143184953791
1137020132727913246101
1159532967179041117856111
11611042410001461120158923467121

A026747 as a square array

111111111111
1346791012131516
1411173039587095110
15164474143201329424
1622661843276711000
1729952797901461
18371324111201
1946178589
11056234
11167
112
1
111111111111
1346791012131516
1411173039587095110
15164474143201329424
1622661843276711000
1729952797901461
18371324111201
1946178589
11056234
11167
112
1