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A081578 as a triangular array

1
11
151
1991
11333131
1177373171
121129245129211
125201593593201251
129289118119211181289291
1333932073488148812073393331
13751333331049715525104973333513371

A081578 as a square array

11111111111
15913172125293337
193373129201289393513
11373245593118120733333
1171295931921488110497
1212011181488115525
125289207310497
1293933333
133513
137
1

A081578 as an upper right triangle

11111111111
15913172125293337
193373129201289393513
11373245593118120733333
1171295931921488110497
1212011181488115525
125289207310497
1293933333
133513
137
1

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Last modified March 29 10:22 EDT 2024. Contains 371268 sequences. (Running on oeis4.)