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A055373 as a triangular array

1
11
363
927279
2710816210827
8140581081040581
24314583645486036451458243
7295103153092551525515153095103729
2187174966123612247215309012247261236174962187
6561

A055373 as a square array

1139278124372921876561
16271084051458510317496
32716281036451530961236
9108810486025515122472
27405364525515153090
81145815309122472
243510361236
72917496
2187
1139278124372921876561
16271084051458510317496
32716281036451530961236
9108810486025515122472
27405364525515153090
81145815309122472
243510361236
72917496
2187