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A189280 as a triangular array

1
11
141
1991
12545251
164225225641
11691125270411251691
14415625292412924156254411
11156281253237616704803237612812511561
13025140625355322515594601155946013553225

A189280 as a square array

1111111111
149256416944111563025
19452251125562528125140625
1252252704292413237613553225
16411252924167048015594601
1169562532376115594601
1441281253553225
11156
1

A189280 as an upper right triangle

1111111111
149256416944111563025
19452251125562528125140625
1252252704292413237613553225
16411252924167048015594601
1169562532376115594601
1441281253553225
11156
1

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Last modified June 19 15:42 EDT 2021. Contains 345142 sequences. (Running on oeis4.)