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A026374 as a triangular array

1
11
131
1441
161161
17171771
1930453091
11039757539101
1125814419514458121
1137020233933920270131
1159533068587368533095151

A026374 as a square array

11111111111
13467910121315
1411173039587095
16174575144202330
173075195339685
1939144339873
11058202685
11270330
11395
115
1
11111111111
13467910121315
1411173039587095
16174575144202330
173075195339685
1939144339873
11058202685
11270330
11395
115
1