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A298554 as a triangular array

1
11
151
1771
1184181
1311414311
165163316651
1130517474511301
12531042263412261042531
1519262716107310737162625191
110186892211382241573822221168910181

A298554 as a square array

11111111111
1571831651302535191018
174141651104262689
1181433742267162211
131167434110733822
1655122610734157
11301047163822
12532622211
1519689
11018
1
11111111111
1571831651302535191018
174141651104262689
1181433742267162211
131167434110733822
1655122610734157
11301047163822
12532622211
1519689
11018
1