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A181974 as a triangular array

1
11
231
3421
57541
81110931
13182020951
21293840221541
3447717851401461
557613014711195402251
89123235272233213105682071

A181974 as a square array

1123581321345589
13471118294776123
12510203871130235
149204078147272
1392251111233
15154095213
141440105
162268
1520
17
1

A181974 as an upper right triangle

1123581321345589
13471118294776123
12510203871130235
149204078147272
1392251111233
15154095213
141440105
162268
1520
17
1

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Last modified April 17 08:16 EDT 2021. Contains 343064 sequences. (Running on oeis4.)